BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/23061/333601
DTSTART:20191210T100000Z
DTEND:20191210T110000Z
CLASS:PUBLIC
CREATED:20191128T104524Z
DESCRIPTION:We present a comprehensive theoretical framework for interactio
n of an ultrashort light pulse with a thin material based on the time-depe
ndent density functional theory (TDDFT) [1] . We introduce a mi
croscopic description solving the Maxwell equations for the light electrom
agnetic fields and the time-dependent Kohn-Sham equation for the electron
dynamics simultaneously in the time domain on a common real-space grid. Th
is scheme can simulate the light-matter interaction in thin films irrespec
tive of the film thickness and the light intensity.\nVortragende(r): Shuns
uke Yamada
LAST-MODIFIED:20191128T121727Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Angel Rubio:mailto:office.rubio@mpsd.mpg.de
SUMMARY: First-principles description for light-matter interaction in thin
materials: From linear response to HHG spectrum
URL;VALUE=URI:https://www.mpsd.mpg.de/events/23061/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/22614/333601
DTSTART:20191204T140000Z
DTEND:20191204T160000Z
CLASS:PUBLIC
CREATED:20191112T100731Z
DESCRIPTION: Water and ice surfaces and interfaces are ubiquitous\, not jus
t in nature\, but also in many technological applications. Water is a rath
er unique liquid\, owing to its strong intermolecular interactions: strong
hydrogen bonds hold water molecules together. At the surface of water and
ice\, the water hydrogen-bonded network is abruptly interrupted\, conferr
ing distinct properties on the interface\, compared to bulk. I will presen
t some challenges (“how can we study the ~1 monolayer of water molecules
that is in direct contact with the other phase\, and distinguish this ~An
gstrom-thin layer from the bulk?”) and progress in the study of interfac
ial water. I will specifically address the interaction of water with charg
ed interfaces\, and attempt to explain why ice is slippery.\nVortragender:
Mischa Bonn
LAST-MODIFIED:20191112T101818Z
LOCATION:Bahrenfeld Campus\, Raum: DESY Auditorium Bldg. 5
ORGANIZER;CN="MPI for the Structure and Dynamics of Matter, MPI for Meteoro
logy":mailto:
SUMMARY:Max Planck lecture for natural sciences: A Molecular View of Water
and Ice Interfaces
URL;VALUE=URI:https://www.mpsd.mpg.de/events/22614/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/23071/333601
DTSTART:20191204T090000Z
DTEND:20191204T100000Z
CLASS:PUBLIC
CREATED:20191129T103150Z
DESCRIPTION:The surprising insulating and superconducting states of narrow-
band graphene twisted bilayers have been mostly discussed so far in terms
of strong electron correlation\, with little or no attention to phonons an
d electron-phonon effects. We found that\, among the 33492 phonons of a fu
lly relaxed 1.08° twisted bilayer\, there are few special\, hard\, and ne
arly dispersionless modes that resemble global vibrations of the moiré su
percell ('moirè phonons').\nVortragende(r): Mattia Angeli
LAST-MODIFIED:20191129T103150Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN="Simone Latini, Angel Rubio":mailto:office.rubio@mpsd.mpg.de
SUMMARY:MPSD Seminar: Valley Jahn-Teller effect in Twisted Bilayer Graphene
URL;VALUE=URI:https://www.mpsd.mpg.de/events/23071/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/23060/333601
DTSTART:20191203T130000Z
DTEND:20191203T140000Z
CLASS:PUBLIC
CREATED:20191128T103850Z
DESCRIPTION:I will review different aspects of coupled cluster theory with
focus on recent developments. In particular\, similarity constrained coupl
ed cluster theory1 for conical intersections and nonadiabatic d
ynamics\, pump-probe simulations using time-dependent coupled cluster theo
ry2 and coupled cluster theory for strong light-matter interact
ions (Cavity QED chemistry).3\nVortragende(r): Henrik Koch
LAST-MODIFIED:20191129T103942Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN="Simone Latini, Angel Rubio":mailto:office.rubio@mpsd.mpg.de
SUMMARY:MPSD Seminar: Coupled cluster theory with applications to conical i
ntersections and quantum electrodynamics
URL;VALUE=URI:https://www.mpsd.mpg.de/events/23060/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/22898/333601
DTSTART:20191127T100000Z
CLASS:PUBLIC
CREATED:20191118T103059Z
DESCRIPTION:Most biological functions and many chemical processes are drive
n by chiral nanoscale molecular machines in solution\, whose structures ev
olve on multiple time and length scales: from the ultrafast rotations of p
hoto-driven synthetic molecular motors to the global conformational change
s of proteins on the microsecond time scale. Yet capturing the associated
conformational transitions in real-time continues to be a formidable exper
imental challenge\, as prominent established methods come with their own l
imitations: solution nuclear magnetic resonance is limited to millisecond
real-time resolution\, whilst solution X-Ray scattering requires large-sca
le X-Ray facilities. A promising laboratory-based alternative is circular
dichroism (CD)\, the absorption difference of left- and right-handed circu
larly polarized light\, which is sensitive to the chiral geometrical arran
gement of light-absorbing chemical groups within a molecular system. Stead
y-state CD is already a well-established tool in the far and middle ultrav
iolet (UV) <\; 300 nm\, where equilibrium structures of proteins\, DNA a
nd functional chiral organic complexes are routinely characterized. Howeve
r\, pushing this technique into the time-domain has remained a challenge f
or over three decades\, with only few isolated reports with sub-nanosecond
resolution [1]. In this talk\, I will present a technological breakthroug
h with the first time-resolved CD (TRCD) spectrometer that combines highly
sensitive broadband UV-detection (250-370 nm) with pulsed laser sources a
nd sub-picosecond time-resolution [2]. With this instrument\, it is now po
ssible to extract broadband CD spectra of photo-excited molecular states a
nd follow their transient chirality changes with femtosecond resolution. T
his is opening a new avenue for capturing solution-phase structural dynami
cs in chemical and biological systems that I will illustrate with two exam
ples: the coupling of electronic and structural dynamics in a chiral supra
molecular metal-complex [3]\, and the application of a site-specific CD-la
bel to track conformational changes of the peptide backbone [4]. On this b
asis I will present future developments that will establish TRCD as a comp
lementary method for research in protein dynamics and chiral photochemistr
y\, where the chirality of excited electronic states is the key design fea
ture of chiral organic light-emitting diode materials and unidirectional m
olecular motors\, for example.\nVortragender: Malte Oppermann
LAST-MODIFIED:20191118T103656Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Andrea Cavalleri / Angel Rubio:mailto:
SUMMARY:Transient Chirality in Chemistry and Biology: Capturing the Structu
ral Evolution of Molecules in Solution
URL;VALUE=URI:https://www.mpsd.mpg.de/events/22898/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/22913/333601
DTSTART:20191126T140000Z
DTEND:20191126T150000Z
CLASS:PUBLIC
CREATED:20191118T153021Z
DESCRIPTION: The normal state of unconventional superconductors often exhib
its anomalous transport properties and it is commonly referred to as a “
bad” or “strange” metal. Understanding its collective charge dynamic
s\, which defies the standard quasiparticle description of a Fermi liquid\
, is an outstanding challenge of modern condensed matter physics.In this t
alk\, I will present a direct measurement of the collective charge dynamic
s of the strange metal using inelastic electron scattering. First\, I will
discuss how normal-state Bi2Sr2CaCu2O8+d is defined by a featureless\, lo
calized continuum\, undergoing a low-temperature massive spectral weight r
edistribution. I will then describe how such a phase is found to coexist w
ith a low-energy Fermi liquid in Sr2RuO4.These results indicate that stran
ge metals are highly localized in space and dissipate on ultrafast timesca
les\, seemingly bound only by quantum limits. Implications for the occurre
nce of high-temperature superconductivity will be discussed.\nVortragender
: Matteo Mitrano
LAST-MODIFIED:20191118T153021Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Electronic dynamics of strange metals
URL;VALUE=URI:https://www.mpsd.mpg.de/events/22913/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/21938/333601
DTSTART:20191125T090000Z
DTEND:20191129T120000Z
CLASS:PUBLIC
CREATED:20191016T072425Z
DESCRIPTION:Nonlinear optics (NLO) is one of the most fascinating fields of
modern physics. It deals with light-matter interactions at extreme electr
o-magnetic field strengths. Such fields are today routinely available than
ks to laser technology. NLO started with the observation of second harmoni
c generation from a ruby laser in 1961\, just 1 year after the first laser
was operated. It allows producing optical pulses with durations in the fe
mtosecond (fs\, 10-15 s) and even attosecond (as\, 10-18 s) order. With such sources\, one can observe chemical reactions\, ph
ysical and biological phenomena in real time. During the lectures\, I will
give a short overview of NLO. I will discuss the main physical phenomena
(second harmonic generation\, optical parametric amplification\, differenc
e and sum frequency generation\, white light generation\, third harmonic g
eneration\, high harmonic generation…) and some of their applications\,
and conclude with the newest trends of research like coherent pulse synthe
sis.\nVortragender: Giovanni Cirmi
LAST-MODIFIED:20191018T071429Z
LOCATION:CFEL (Bldg. 99)
ORGANIZER;CN=IMPRS-UFAST:mailto:
SUMMARY:IMPRS-UFAST core course: Non-linear Optics (IMPRS-UFAST Core Course
)
URL;VALUE=URI:https://www.mpsd.mpg.de/events/21938/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/22927/333601
DTSTART:20191122T103000Z
DTEND:20191122T120000Z
CLASS:PUBLIC
CREATED:20191119T134019Z
DESCRIPTION:The rich physics of complex condensed matter systems is largely
understood in terms of minimal tight-binding models\, which describe inte
racting electron systems on a lattice with only few valence orbitals per s
ite. To incorporate a strong light-matter coupling into such models\, one
can project the continuum theory on a given set of valence bands.\nVortrag
ende(r): Martin Eckstein
LAST-MODIFIED:20191119T134506Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN="Simone Latini, Angel Rubio":mailto:office.rubio@mpsd.mpg.de
SUMMARY:MPSD Seminar: Gauge issues in the description of solids with stron
g light-matter coupling
URL;VALUE=URI:https://www.mpsd.mpg.de/events/22927/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/21863/333601
DTSTART:20191107T140000Z
DTEND:20191107T150000Z
CLASS:PUBLIC
CREATED:20191011T112656Z
DESCRIPTION: Water is the most important liquid for life. It is intimately
linked to our well-being. Without water\, cell membranes cannot function.
Charges and charged groups cannot be dissolved\, self-assembly cannot occu
r\, and proteins cannot fold. Apart from the intimate link with life\, wat
er also shapes the earth and our climate. Our landscape is formed by slow
eroding/dissolving processes of rocks in river and sea water\; aerosols an
d rain drops provide a means of transport of water. Because of the complex
ity of liquid water and aqueous interfaces\, the relationship between the
unique properties of water and its molecular structure has not been solved
.\nVortragende: Sylvie Roke
LAST-MODIFIED:20191011T113037Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room III\, EG.080
ORGANIZER;CN=Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Aqueous Nanoscale Systems
URL;VALUE=URI:https://www.mpsd.mpg.de/events/21863/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/21939/333601
DTSTART:20191104T133000Z
DTEND:20191108T113000Z
CLASS:PUBLIC
CREATED:20191016T073520Z
DESCRIPTION:Strong electronic correlations are a main driver behind many ex
citing phenomena in quantum many-body systems\, ranging from correlated qu
antum materials (Mott transition\, high-temperature superconductivity) to
cold atoms in optical lattices. However\, the strong-correlation problem s
till poses many challenges when it comes to a quantitative and even qualit
ative understanding of the relevant degrees of freedom and microscopic int
eractions that drive phase transitions in solids. Dynamical mean-field the
ory (DMFT)\, first developed in the late 1980s and 1990s\, provides one ke
y limit in which the correlation problem becomes tractable\, namely the on
e of large spatial dimensions\, or local self-energies. In this focus cour
se we will discuss the basics behind DMFT and learn how this allows one to
understand the paradigmatic Mott metal-to-insulator transition.\nVortrage
nder: Michael Sentef
LAST-MODIFIED:20191018T073938Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room O1.060
ORGANIZER;CN=IMPRS-UFAST:mailto:
SUMMARY:IMPRS-UFAST focus course: Strongly Correlated Electrons from the Pe
rspective of Dynamical Mean-Field Theory (IMPRS-UFAST Focus Course)
URL;VALUE=URI:https://www.mpsd.mpg.de/events/21939/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/21808/333601
DTSTART:20191015T090000Z
DTEND:20191015T100000Z
CLASS:PUBLIC
CREATED:20191009T121902Z
DESCRIPTION:Green's functions represent one of the most useful tools for th
e theoretical description of correlated lattice electrons. In particular\,
the one-particle Green's function contains information about the spectral
properties of the system and can be directly compared to (angular resolve
d) photoemission spectroscopy experiments. However\, also two-particle cor
relations functions provide very interesting insights into the properties
of correlated electron systems as they contain crucial information on resp
onse functions such as the magnetic susceptibility or the optical conducti
vity. In my talk\, I will present an overview about the physical content a
s well as the applications of two-particle Green's and vertex functions in
frontier condensed matter research. In particular\, I will demonstrate ho
w local frequency-dependent vertices can be used to include non-local corr
elations effects in interacting many-electron systems on top of the local
ones of dynamical mean-field theory (DMFT). While these so-called diagramm
atic extensions [1] of DMFT have been successfully exploited to describe c
ollective phenomena such as magnetism and superconductivity\, their predic
tive power is still limited by specific inconsistencies between the one- a
nd the two-particle level [2]. In the final part of my talk\, I will prese
nt possible solutions to these problems [3] which I will address in the fr
amework of my Emmy Noether project at the University of Hamburg.\nVortrage
nde(r): Georg Rohringer
LAST-MODIFIED:20191009T125846Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room I\, EG.076
ORGANIZER;CN=Michael Sentef:mailto:
SUMMARY:MPSD Seminar: Two-particle correlation functions for the theoretica
l description of strongly correlated electrons systems
URL;VALUE=URI:https://www.mpsd.mpg.de/events/21808/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/20319/333601
DTSTART:20191008T083000Z
DTEND:20191008T093000Z
CLASS:PUBLIC
CREATED:20190911T075813Z
DESCRIPTION: A talk about how to succeed in challenging environments. Dr. G
regor Wittke\, occupational psychologist shares his experience and know-ho
w on coping with stress and high demands in the work place.The talk featur
es a short overview of scientific findings on the topic as well as practic
al hands on strategies to apply in everyday life. Enjoy a mix of facts and
numbers with practical thought experiments and even minimal movement exer
cises to gain confidence and composure or recover energy and determination
.Besides those aspects concerning a helpful attitude to succeed in challen
ging environments and how to gain and maintain it\, this talk will also in
clude a kind of manual for delimiting yourself from an overwhelming amount
of job tasks and focus on your own priorities.\nVortragende(r): Dr. Grego
r Wittke
LAST-MODIFIED:20190911T095945Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room I-II\, EG.076-078
ORGANIZER;CN="MPSD Occupational Health Management, Frauke Kleinwort":mailto
:
SUMMARY:MPSD Health Seminar: Dr. Gregor Wittke: "How to burn for your work
without burning out"
URL;VALUE=URI:https://www.mpsd.mpg.de/events/20319/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/19959/333601
DTSTART:20191007T080000Z
DTEND:20191010T150000Z
CLASS:PUBLIC
CREATED:20190819T133620Z
DESCRIPTION:Details to be found in the intranet soon.
LAST-MODIFIED:20190820T140609Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room I-III\, EG.076-080
ORGANIZER;CN=MPSD Occupational Health Management + Techniker Krankenkasse:m
ailto:
SUMMARY:Mental Health Awareness Week
URL;VALUE=URI:https://www.mpsd.mpg.de/events/19959/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/20835/333601
DTSTART:20191001T090000Z
DTEND:20191001T103000Z
CLASS:PUBLIC
CREATED:20190926T142759Z
DESCRIPTION:Ultra-intense lasers deliver unprecedented energy densities wit
hin microscopic volumes and shortest time spans\, as exemplified by last y
ear’s Physics Nobel Prize. Today\, these lasers facilitate many compact
technical applications such as particle accelerators and sources of intens
e electromagnetic radiation. And the next development stages promise signi
ficant technical advancements as well as deep insights into fundamental sc
ience ranging from nonlinear quantum field theory to studying the complex
quantum vacuum itself.\nVortragende(r): Felix Mackenroth
LAST-MODIFIED:20190926T142759Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Michael Ruggenthaler:mailto:office.rubio@mpsd.mpg.de
SUMMARY:MPSD Seminar: Relativistic ultra-intense laser-plasma physics: fro
m classical to QED regimes
URL;VALUE=URI:https://www.mpsd.mpg.de/events/20835/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/20693/333601
DTSTART:20190925T120000Z
DTEND:20190925T133000Z
CLASS:PUBLIC
CREATED:20190923T112554Z
DESCRIPTION:Despite water being a ubiquitous substance\, it is surprising t
hat some basic questions are still debated. Here using a combination of ex
perimental (cryogenic STM) and theoretical (first-principle electronic str
uctures and molecular dynamics) methods\, we systematically studied the un
usual structure and dynamics of water molecules on NaCl surface. More inte
restingly\, for the first time\, we observe the full quantum effect and ma
gic number hydrates in water system. These results shed light on our under
standing of water at atomic scale.\nVortragende(r): Enge Wang
LAST-MODIFIED:20190924T085114Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Angel Rubio:mailto:office.rubio@mpsd.mpg.de
SUMMARY:MPSD Seminar: Full Quantum Nature of Water on Salt Surface
URL;VALUE=URI:https://www.mpsd.mpg.de/events/20693/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/20673/333601
DTSTART:20190924T123000Z
DTEND:20190924T133000Z
CLASS:PUBLIC
CREATED:20190920T093412Z
DESCRIPTION: Since it’s discovery in 2006\, Graphene has known no rivals
in terms of number of applications that scientists from all over the globe
have thought for him\, ranging from spintronics to energy storage\, from
transistors to bio-compatible devices. However\, what’s still hindering
his big step from laboratories to industry is a cost-effective method to s
ynthesize large-scale good-quality crystals. Over the past decade\, great
improvements have been made in this direction\, and CVD consolidated as an
excellent candidate for this arduous task. Among other methods\, a novel
technique consisting in the synthesis of crystals on transition metals in
the liquid phase has proven to overcome many difficulties related to defec
t-inducing dislocations and low-diffusivity of solid substrates. Neverthel
ess\, a clear physical insight over the processes involved during graphene
nucleation and growth is still lacking\, and many of its parameters are d
erived by post-process analyses\, neglecting those crucial intermediate st
eps that may conceal key-factors involved in the process. The reason for t
his trend is that it’s technically difficult to combine different experi
mental set-ups\, and an ad-hoc design is more than ever needed to conduct
a complete and satisfying investigation. This is the reason behind the LMC
at project\, that developed a reactor suitable both for CVD growth at high
temperature by hydrocarbon decomposition and for in-situ Raman and optica
l studies\, in order to follow in real time the growth of graphene flakes
and\, at the same time\, determine its physical properties. Additionally\,
it aims to prove X-ray techniques\, such as GID and XRR\, as an efficient
tool for high temperature characterization\, a feat never achieved before
. This is the framework of this thesis work\, which can of course cover it
only partially and at a rather early stage. The focus has been put on the
surprising high contrast showed by radiative optical microscopy at high t
emperatures (∼ 1100 C°) and on the first\, surprising results coming fr
om X-ray analysis. The former has been proven as an effective tool for fol
lowing the growth and derive kinematical parameters\, the latter as a pote
ntial tool for quantitatively estimate its crystal structure at conditions
prohibitive for standard probes.\nVortragender: Sebastian Fava
LAST-MODIFIED:20190923T100727Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room V\, O1.109
ORGANIZER;CN=Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Growth Dynamics of Graphene on molten copper
URL;VALUE=URI:https://www.mpsd.mpg.de/events/20673/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/20286/333601
DTSTART:20190917T090000Z
DTEND:20190917T100000Z
CLASS:PUBLIC
CREATED:20190909T143538Z
DESCRIPTION:To understand the function of condensed matter\, it would be de
sirable to directly watch its atomistic building blocks dynamically intera
ct on their intrinsic length and time scales. Recently\, lightwave electro
nics has made this long-standing dream come true. The idea is to exploit t
he carrier wave of light as an ultrafast\, contact-free bias to interrogat
e and control the nanocosm. I will first review how lightwaves can drive e
lectrons in solids into surprising sub-cycle quantum motion. By combining
this idea with the sub-angstrom spatial resolution of scanning tunnelling
microscopy we can set an ultrashort time window for single-electron tunnel
ling into a single orbital and record first atom-scale slow-motion movies
of individual vibrating molecules. Finally\, I will show how to directly e
xert femtosecond atomic forces\, which can selectively choreograph a coher
ent structural motion of a single-molecule switch in its electronic ground
state. This stunningly direct access to the atomistic world may tailor ke
y elementary dynamics in nature and steer (bio)chemical reactions or ultra
fast phase transitions\, on their intrinsic spatio-temporal scales.\nVortr
agende(r): Rupert Huber
LAST-MODIFIED:20190909T143606Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Ultrafast single-molecule videography and choreograph
y
URL;VALUE=URI:https://www.mpsd.mpg.de/events/20286/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/18951/333601
DTSTART:20190617T120000Z
DTEND:20190617T133000Z
CLASS:PUBLIC
CREATED:20190606T123039Z
DESCRIPTION:High harmonic generation (HHG) from crystalline solids has beco
me a playground in ultrafast phenomena. In contrast to noble gases\, cryst
alline solids have rich physical properties\, e.g. anharmonic energy dispe
rsion\, anisotropy depending on crystalline axis\, strong electron-hole co
rrelation\, and so on. While the three-step model for HHG and its generali
zations are successfully applicable to several situations\, a deviation fr
om the theoretical prediction is one of the most interesting physics in th
is field. To understand such deviations in solid-state HHG experiments\, w
e need to go beyond the three-step model or along different directions. I
will mainly talk about our recent trials to understand solid-state HHG\, e
lectron-hole attraction inclusion based on Hartree-Fock theory for 1D mode
l crystal\, and an ab-initio approach based on density-functional theory f
or 3D bulk solid comparing with experiments.\nVortragender: Yasushi Shin
ohara
LAST-MODIFIED:20190606T123237Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Angel Rubio:mailto:
SUMMARY:MPSD Seminar: Theoretical study on solid-state high harmonic genera
tion: from a one-dimensional model to an ab-initio three-dimensional appro
ach
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18951/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/18967/333601
DTSTART:20190613T130000Z
DTEND:20190613T140000Z
CLASS:PUBLIC
CREATED:20190611T113838Z
DESCRIPTION: Colloidal nanocrystals (CNCs) are nanometer sized crystals gro
wn in solution. Due to their size-tunable optical properties\, CNCs have e
merged as a novel material platform for numerous applications such as disp
lays\, photovoltaics\, and biological tagging. However\, the colloidal gro
wth process results in an unavoidable distribution of CNC size that inhomo
geneously broadens optical absorption/luminescence lineshapes. 2-D spectro
scopy is a technique capable of circumventing inhomogeneous broadening by
correlating absorption and emission dynamics. In this talk I will present
our results from applying 2-D spectroscopy to CNCs at cryogenic temperatur
es. I will first discuss our experiments on conventional CdSe CNCs\, in wh
ich we have simultaneously observed both bulk-like acoustic phonons and ac
oustic vibrations discretized by the nanocrystal geometry for the first ti
me. Next\, I discuss our experiments on perovskite CNCs\, which are a new
class of materials first synthesized in 2015. We demonstrate that coherenc
es due to vibrational coupling exhibit anomalous dephasing dynamics\, whic
h we attribute to a cascaded coherence transfer process. Finally\, I discu
ss our observations of coherences between so-called bright-triplet exciton
states\, which are robust at high temperatures and polarization-selective
.\nVortragende(r): Albert Liu
LAST-MODIFIED:20190611T113838Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room V\, O1.109
ORGANIZER;CN=Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Electronic and Vibrational Properties of Colloidal N
anocrystals
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18967/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/18952/333601
DTSTART:20190612T123000Z
DTEND:20190612T140000Z
CLASS:PUBLIC
CREATED:20190606T123929Z
DESCRIPTION:Driven-dissipative systems represent natural platforms to study
non-equilibrium phases. In the first part of the talk\, I will present so
me physical results for which both non-equilibrium conditions and interact
ions are crucial. I will argue that a prototype model of correlated driven
-dissipative lattice bosons\, relevant for upcoming generation of circuit
QED arrays experiments\, exhibits a phase transition where a finite freque
ncy mode becomes unstable\, as an effect of quantum interactions and non-e
quilibrium conditions. In the broken-symmetry phase the corresponding macr
oscopic order parameter becomes non-stationary and oscillates in time with
out damping\, thus breaking continuous time-translational symmetry. To get
some more insights on this transition\, I studied the spectral properties
of Markovian driven-dissipative quantum systems using a Lehmann represent
ation. Focusing on the nonlinear quantum Van der Pol oscillator as a parad
igmatic example\, I showed that a sign constraint of spectral functions\,
which is mathematically exact for closed systems\, gets relaxed for open s
ystems\; it is eventually replaced by an interplay between dissipation and
interactions. In the last part of the talk\, I will finally discuss a new
method to solve quantum impurity models\, small interacting quantum syste
ms coupled to a non-Markovian environment\, in presence of additional Mark
ovian dissipation. I will derive a Dyson equation for the time-evolution o
perator of the reduced density matrix and approximate its self-energy resu
ming only non-crossing diagrams. I will test this approach on a simple pro
blem of a fermionic impurity.\nVortragender: Orazio Scarlatella
LAST-MODIFIED:20190606T124053Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room O1.060
ORGANIZER;CN=Michael Sentef:mailto:
SUMMARY:MPSD Seminar: Correlated driven-dissipative systems
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18952/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/18927/333601
DTSTART:20190611T090000Z
DTEND:20190611T100000Z
CLASS:PUBLIC
CREATED:20190604T111923Z
DESCRIPTION: “Quantum materials” loosely defines a broad collection of
materials whose ground states are defined by unusual quantum properties. T
his research largely focuses on macroscopic single crystals\, yet naturall
y interesting quantum phenomena lie beyond their equilibrium state. My gro
up works towards reducing the sample size onto the sub-mm length scale\, f
ollowing the general idea that small samples can be driven more strongly a
nd react faster than on the macro scale. Our main tool is Focused Ion Beam
machining capable of cutting single crystals into high quality quantum de
vices. I will present two concrete research projects showcasing how new qu
antum states out of equilibrium can be accessed and investigated in FIB-pr
epared microcrystal structures. The first concerns the heavy fermion super
conductor\, CeIrIn5 (Tc~400mK). When a mm-sized structure is fi
rmly coupled to a mm-sized substrate of different thermal expansion\, the
microstructure is under significant strain at low temperatures. By precise
ly controlling its shape\, the emergent strain field can be controlled. Th
e key difference to other approaches\, such as uniaxial strain\, is that c
omplex\, yet well-controlled\, spatially varying strain fields can be achi
eved. In collaboration with Katja Nowack (Cornell)\, we have experimentall
y mapped out the resulting superconducting landscape in the devices using
scanning-SQUID microscopy\, and show that this spatial modulation can be w
ell captured by finite element simulations. [1] Second\, I will present ou
r ongoing efforts to experimentally identify pseudo-magnetic fields in 3D
Dirac semi-metals [2\,3]. Owing to their Dirac dispersion\, deformation of
the crystal structure does not open a gap at the nodes\, but shifts the l
ocation of the nodes in k-space and hence playing the role of a “pseudo-
magnetic field”\, B5. I will show how microstructuring gives
us unprecedented control of such a process\, and discuss how future.\nVort
ragende(r): Philip Moll
LAST-MODIFIED:20190604T113619Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Tuning quantum materials out of equilibrium: A FIB-m
icrostructuring approach
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18927/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/18880/333601
DTSTART:20190604T133000Z
DTEND:20190604T143000Z
CLASS:PUBLIC
CREATED:20190528T101851Z
DESCRIPTION: Magnetic fields are challenging to localise to short length sc
ales because their sources are electrical currents. Conversely\, electric
fields can be applied using electrostatic gates on scales limited only by
lithography. This has important consequences for the design of spin-based
information technologies: while the Zeeman interaction with a magnetic fie
ld provides a convenient tool for manipulating spins\, it is difficult to
achieve local control of individual spins on the length scale anticipated
for useful quantum technologies. This motivates the study of electric fiel
d control of spin Hamiltonians [1]. Mn2+ defects in ZnO exhibit extremely
long spin coherence times and a small axial zero-field splitting. Their en
vironment is inversion-symmetry-broken\, and the zero-field splitting show
s a linear dependence on an externally-applied electric field. This contro
l over the spin Hamiltonian offers a route to controlling the phase of sup
erpositions of spin states using d.c. electric field pulses\, and to drivi
ng spin transitions using microwave electric fields [2]. Experiments on Mn
defects in ZnO provide insights into how to achieve manipulation of indiv
idual spins on surfaces using a scanning tunnelling microscope. A high-fre
quency voltage applied to the tip can drive electron spin resonance in Fe
atoms on MgO surfaces via modulation of the crystal field experienced by t
he Fe atom [3]. It has been proposed theoretically that frustrated exchang
e-coupled molecular clusters might offer sensitivity to externally-applied
electric fields [4]. Experiments on an antiferromagnetically-coupled Cu3
compound reveal a small linear electric field effect. A comparable sensiti
vity is exhibited by the heterometallic S = 1 antiferromagnetic ring Cr7Mn
\, but no effect is found for the S = 1/2 Cr7Ni [5].\nVortragende(r): Arzh
ang Ardavan
LAST-MODIFIED:20190528T101851Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room III\, EG.080
ORGANIZER;CN=Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Electrical control of quantum spins
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18880/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/18727/333601
DTSTART:20190523T080000Z
DTEND:20190523T100000Z
CLASS:PUBLIC
CREATED:20190516T102503Z
DESCRIPTION:We argue that a correlated fluid of electrons and holes can exh
ibit a fractional quantum Hall effect at zero magnetic field analogous to
the Laughlin state at filling 1/m. We introduce a variant of the Laughlin
wavefunction for electrons and holes and show that for m=1 it describes a
Chern insulator that is the exact ground state of a free fermion model wit
h p_x + i p_y excitonic pairing.\nVortragende(r): Charles Kane
LAST-MODIFIED:20190516T102503Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Angel Rubio:mailto:
SUMMARY:MPSD Seminar: Fractional Excitonic Insulator
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18727/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/17974/333601
DTSTART:20190522T120000Z
DTEND:20190522T140000Z
CLASS:PUBLIC
CREATED:20190308T133042Z
DESCRIPTION:Symmetry and topology are two of the conceptual pillars that un
derlie our understanding of matter. While both ideas are old\, over the pa
st several years a new appreciation of their interplay has led to dramatic
progress in our understanding of topological electronic phases. A paradig
m that has emerged is that insulating electronic states with an energy gap
fall into distinct topological classes.\nVortragende(r): Charles Kane
LAST-MODIFIED:20190429T133740Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room I-III\, Foyer
ORGANIZER;CN=Angel Rubio:mailto:office.rubio@mpsd.mpg.de
SUMMARY:Reimar Lüst Lecture: Reimar Lüst Lecture -Prof. Charles Kane: Sym
metry\, topology and electronic phases of matter
URL;VALUE=URI:https://www.mpsd.mpg.de/events/17974/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/18814/333601
DTSTART:20190522T080000Z
DTEND:20190522T093000Z
CLASS:PUBLIC
CREATED:20190521T085223Z
DESCRIPTION: Historically charge density waves have been associated with th
e notions of Fermi surface nesting and\, at the transition temperature\, a
soft phonon mode. In this talk\, I will present two cases that defy this
common theme. First\, I will show that TiSe2 undergoes a transition due to
exciton condensation\, which exhibits a soft mode of a different\, electr
onic variety. Second\, when driving the system away from equilibrium\, the
phase transition is mediated by topological defects. These defects allow
for the formation of a charge density wave that does not occur in equilibr
ium. This light-induced charge density wave shows some unique properties t
hat suggest that it is not just a trivial extension of an equilibrium one.
\nVortragende(r): Anshul Kogar
LAST-MODIFIED:20190521T085223Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Unconventional Charge Density Wave Transitions
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18814/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/18710/333601
DTSTART:20190521T083000Z
DTEND:20190521T100000Z
CLASS:PUBLIC
CREATED:20190514T151033Z
DESCRIPTION:When a collection of electronic excitations are strongly couple
d to a single mode cavity\, mixed light-matter excitations called polarito
ns are created. The situation is especiallyinteresting when the strength o
f the light-matter coupling Ωr is such that the coupling energy becomes c
lose to the one of the bare matter resonance ω0. For this value of parame
ters\, the system enters the so-called ultra-strong coupling regime\, in w
hich a number of very interesting physical effects were predicted. Using m
etamaterial coupled to two-dimensional electron gases[1]\, we have demonst
rated that a ratio Ωr/ω0 close to[2] or above unity can be reached.\nVor
tragende(r): Jérôme Faist
LAST-MODIFIED:20190516T102938Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room I-III\, EG.076-080
ORGANIZER;CN=Angel Rubio:mailto:
SUMMARY:MPSD Seminar: Engineering with vacuum fields
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18710/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/18709/333601
DTSTART:20190520T120000Z
DTEND:20190520T133000Z
CLASS:PUBLIC
CREATED:20190514T150118Z
DESCRIPTION:The concept of a single mode of the electromagnetic field inter
acting with matter has been a paradigm in the field of light-matter intera
ctions. For example\, the single mode Jaynes-Cummings model and its many g
eneralizations have been indispensable tools in studying the quantum dynam
ics of various systems. In particular in cavity and circuit QED\, where st
rong light-matter coupling is routinely achieved in experiment\, such mode
ls have been tremendously successful [1].\nVortragende(r): Dominik Lentrod
t
LAST-MODIFIED:20190516T102959Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Angel Rubio:mailto:
SUMMARY:MPSD Seminar: Ab initio few-mode theories for quantum potential sca
ttering problems
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18709/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/17964/333601
DTSTART:20190429T123000Z
DTEND:20190503T153000Z
CLASS:PUBLIC
CREATED:20190307T133254Z
DESCRIPTION:From a microscopic point of view\, a solid is just a regular ar
rangement of atoms\, embedded in a soup of electrons. Yet\, a remarkably r
ich manifold of phenomena emerges from this simple starting point\, rangin
g from simple metals and semiconductors to multiple kinds of magnetic orde
r or superconductivity. In this course we will discuss basic properties of
solids and their microscopic understanding.Topics include:- band theory-
screening- phonons - ordered phases
LAST-MODIFIED:20190307T134551Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room V\, O1.109
SUMMARY:IMPRS-UFAST core course: Solid State Physics
URL;VALUE=URI:https://www.mpsd.mpg.de/events/17964/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/18197/333601
DTSTART:20190410T090000Z
DTEND:20190410T100000Z
CLASS:PUBLIC
CREATED:20190402T104452Z
DESCRIPTION: Nonlinear optics has recently emerged as an attractive approac
h for both probing topological properties and driving Dirac materials into
new states. Here\, I will describe our use of ultrafast nonlinear optics
to study three representative Dirac materials: graphene micro-ribbons\, to
pological insulators\, and Weyl semimetals.\nVortragende(r): Rohit P. Pras
ankumar
LAST-MODIFIED:20190405T083432Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Shedding New Light on Dirac Materials with Nonlinear
Optics
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18197/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/18171/333601
DTSTART:20190409T120000Z
DTEND:20190409T130000Z
CLASS:PUBLIC
CREATED:20190327T121133Z
DESCRIPTION: Although the principles of quantum optics have yielded multipl
e ideas to surpass the classical limitations in optical microscopy\, their
application in life science imaging has remained extremely challenging. I
n this talk\, I will present two works that apply measurements of photon c
orrelations for the benefit of localization microscopy and image scanning
microscopy (ISM). The first uses photon antibunching measurement to estima
te the number of emitters in a fluctuating scene and can potentially speed
-up super-resolution techniques based on localization microscopy [1]. In t
he second work\, we employ photon antibunching as the imaging contrast its
elf. Measuring the spatial distribution of ‘missing’ photon pairs in a
n ISM architecture may enhance lateral resolution four time beyond the dif
fraction limit [2]. The robustness of the antibunching signal enabled supe
r-resolved imaging of fixed cells\, relying solely on a quantum contrast.\
nVortragende(r): Ron Tenne
LAST-MODIFIED:20190328T142305Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Quantum enhanced super-resolution microscopy
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18171/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/18182/333601
DTSTART:20190403T090000Z
DTEND:20190403T100000Z
CLASS:PUBLIC
CREATED:20190329T104501Z
DESCRIPTION: I will discuss new theoretical approaches for analyzing pump a
nd probe experiments in solid state systems. The focus will be on combinin
g theoretical techniques from condensed matter physics and quantum optics.
Several examples will be discussed\, including light amplification in pho
to-excited superconductors and insulators\, ultrafast molecular dynamics i
n terahertz-STM experiments.\nVortragende(r): Eugene Demler
LAST-MODIFIED:20190329T104501Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room III\, EG.080
ORGANIZER;CN=Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Many-body dynamics in pump and probe experiments: Fr
om light amplification to terahertz STM
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18182/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/18169/333601
DTSTART:20190402T090000Z
DTEND:20190402T100000Z
CLASS:PUBLIC
CREATED:20190327T113753Z
DESCRIPTION: Geometrically frustrated magnets often possess accidentally de
generate ground states at zero temperature. At low temperature\, thermal f
luctuations lift the accidental degeneracy and tend to stabilize ground st
ates with maximal entropy. This phenomenon\, known as “order by disorder
”\, underlines the fluctuation contribution to the free energy landscape
in frustrated magnets.In this talk\, I show that one can control such fre
e energy landscape in a non-equilibrium setting. In a frustrated magnet wi
th precessional dynamics\, the system’s slow drift motion within the deg
enerate ground state manifold is governed by the fast modes out of the man
ifold. Exciting these fast modes generates a tuneable effective free energ
y landscape with minima located at thermodynamically unstable portions of
the ground state manifold. I demonstrate this phenomenon on pyrochlore XY
antiferromagnet\, where a magnetic field pulse is sufficient for controlli
ng the effective free energy landscape at nonequilibrium.\nVortragende(r):
Yuan Wan
LAST-MODIFIED:20190328T142200Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Michael Fechner / Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Non-equilibrium control of the effective free energy
landscape in a frustrated magnet
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18169/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/17985/333601
DTSTART:20190327T130000Z
DTEND:20190327T140000Z
CLASS:PUBLIC
CREATED:20190311T170327Z
DESCRIPTION:When we theoretically investigate interaction of an intense and
ultrashort laser pulse with solids\, there are two aspects that should be
considered: the strong electric field of the light pulse induces nonlinea
r electron dynamics in solids\, and the nonlinear polarization that arises
from the electron dynamics affects the propagation of the light pulse.\nV
ortragende(r): Kazuhiro Yabana
LAST-MODIFIED:20190326T111000Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room V\, O1.109
ORGANIZER;CN=Angel Rubio:mailto:theory.assistant@mpsd.mpg.de
SUMMARY:MPSD Seminar: Ab-initio description for propagation of extreme ligh
t pulse in solids: recent progresses
URL;VALUE=URI:https://www.mpsd.mpg.de/events/17985/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/17971/333601
DTSTART:20190326T130000Z
DTEND:20190326T140000Z
CLASS:PUBLIC
CREATED:20190308T123922Z
DESCRIPTION:Collective phenomena originating from interactions between ligh
t and matter have become a major focus of interest spanning different fiel
ds of research.\nVortragende(r): Giacomo Mazza
LAST-MODIFIED:20190326T111059Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Angel Rubio:mailto:theory.assistant@mpsd.mpg.de
SUMMARY:MPSD Seminar: Coherent states of light and ordered states of matter
in cavity QED
URL;VALUE=URI:https://www.mpsd.mpg.de/events/17971/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/18035/333601
DTSTART:20190326T100000Z
DTEND:20190326T110000Z
CLASS:PUBLIC
CREATED:20190313T102704Z
DESCRIPTION: In rare earth intermetallics with weakly bound f-electrons and
a Kondo energy scale much larger than magnetic exchange interactions or c
rystal field splittings\, the screening of local moments may result in a n
on-magnetic Fermi liquid ground state [1]. At low temperatures\, the quant
um fluctuations between magnetic and non-magnetic valence configurations c
an then acquire a cooperative (lattice) character. On a phenomenological b
asis\, a sound understanding of this Anderson Lattice phenomenon has been
achieved. On the other hand\, the microscopic description of the coherent
coupling between Kondo-screened sites remains an outstanding theoretical c
hallenge [2]. In experiment\, the cooperative character of Anderson Lattic
es has only recently become directly accessible. Momentum-resolved spectro
scopies\, such as angle-resolved photoemission and inelastic neutron scatt
ering\, reveal the emergence of characteristic low-energy quasiparticle dy
namics at low temperatures [3]. These methods probe single-particle excita
tions in the charge and magnetic channels\, respectively. By contrast\, hi
gh-resolution resonant inelastic x-ray scattering (RIXS) experiments coupl
e to both charge and spin degrees of freedom in a non-trivial way and thus
provide a more subtle point of view. If calculations of the underlying Kr
amers-Heisenberg term on a basis of strongly correlated f-electronic bands
are achieved\, RIXS may unlock unprecedented microscopic insights into th
e entanglement of local and itinerant charge and magnetic degrees of freed
om. This would address a fundamental mechanism of quantum matter\, with re
levance far beyond lanthanides and actinides. I will review previous spect
roscopic investigations of intermediate valence materials\, present our re
cent RIXS results on the archetypal Anderson Lattice compound CePd3\, and
highlight some ideas for future x-ray scattering studies at 3rd and 4th ge
neration light sources.\nVortragende(r): Marein Rahn
LAST-MODIFIED:20190313T102704Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room I\, EG.076
ORGANIZER;CN=Michael Först / Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Cooperative valence dynamics in Anderson Lattices obs
erved by resonant inelastic x-ray scattering
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18035/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/18034/333601
DTSTART:20190318T130000Z
DTEND:20190318T140000Z
CLASS:PUBLIC
CREATED:20190313T101652Z
DESCRIPTION: Lasers have captured scientific interest since their inception
and increase in the on-target intensity has resulted in powerful petawatt
(≈1015W) laser systems across the globe [1]. Such a laser gives the pos
sibility to study and optimize processes such as electron [2] or ion [3] a
cceleration resulting from interaction of extreme electric fields (E ≥ 0
.5 TV/m) with matter 0. In this talk\, I would outline the current efforts
of POLARIS (a Petawatt laser system) in Jena to study the effects of such
laser-plasma interaction. A single-shot all optical probing was performed
with Aluminum targets to fully characterize the plasma evolution. The bas
ic motivation of the work\, the experimental setup used and some results w
ould be presented in the talk.\nVortragende(r): Faran Irshad
LAST-MODIFIED:20190313T101652Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Michael Först / Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Single-shot optical probing of laser-generated plasm
as
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18034/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/17647/333601
DTSTART:20190213T140000Z
DTEND:20190213T150000Z
CLASS:PUBLIC
CREATED:20190207T154748Z
DESCRIPTION:We investigate ground state properties of electronic materials
strongly coupled to cavity fields. In a two-dimensional electron gas\, we
explore electron paring mediated by vacuum fluctuations of the transverse
electromagnetic field. To date\, these interactions have only been discuss
ed in free space\, where their impact is restricted to extremely low tempe
ratures. We argue that the sub-wavelength confinement of the light field i
n nanoplasmonic cavities can enhance the induced interaction to an experim
entally accessible regime. In a one-dimensional Hubbard model\, the cavity
further enhances magnetic couplings at half-filling\, and introduces next
-nearest-neighbor hopping. References: F. Schlawin\, A. Cavalleri\, and D.
Jaksch\, arXiv:1804.07142. M. Kiffner\, J. Coulthard\, F. Schlawin\, A. A
rdavan and D. Jaksch\, arXiv: 1806.06752.\nVortragende(r): Frank Schlawin
LAST-MODIFIED:20190207T155041Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Ángel Rubio:mailto:
SUMMARY:MPSD Seminar: Manipulating quantum materials with cavity fields
URL;VALUE=URI:https://www.mpsd.mpg.de/events/17647/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/17608/333601
DTSTART:20190206T090000Z
DTEND:20190206T103000Z
CLASS:PUBLIC
CREATED:20190205T142434Z
DESCRIPTION:Nonequilibrium pump-probe time-domain spectroscopy opens new pe
rspectives in studying the dynamical properties of the strongly correlated
electron systems. In particular\, the interplay between different degrees
of freedom in strongly correlated materials can be studied by their tempo
ral evolution [1] and also the optical switching to some novel phases is p
ossible [2].\nVortragende(r): Nikolaj Bittner
LAST-MODIFIED:20190205T142750Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Angel Rubio:mailto:
SUMMARY:MPSD Seminar: Nonequilibrium dynamics in strongly correlated system
s: spin-charge coupling in a photodoped Mott insulator and possible induce
d superconductivity
URL;VALUE=URI:https://www.mpsd.mpg.de/events/17608/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/17490/333601
DTSTART:20190130T130000Z
DTEND:20190130T150000Z
CLASS:PUBLIC
CREATED:20190124T124513Z
DESCRIPTION:Correlation-driven metal-insulator transitions are typically co
upled strongly both to local (octahedral distortion) and long wavelength (
strain) lattice distortions. I present a theory of the intertwined electro
nic and lattice transitions in correlated materials\, and show how it acco
unts for phenomena ranging from the interplay between nematic and magnetic
ordering in pnictide superconductors\, to the strain and current dependen
ce of the metal insulator transitions in Ca2RuO4 and Ca3Ru2O7 and superlat
tice effects in the rare earth nickelates.\nVortragende(r): Andrew Millis
LAST-MODIFIED:20190124T135301Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room I-III\, EG.076-080
ORGANIZER;CN=Angel Rubio:mailto:
SUMMARY:MPSD Seminar: Strain\, lattice distortions and the metal-insulator
transition in correlated electron materials
URL;VALUE=URI:https://www.mpsd.mpg.de/events/17490/333601
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20261013T102536Z
UID:https://www.mpsd.mpg.de/events/17056/333601
DTSTART:20190115T100000Z
DTEND:20190115T110000Z
CLASS:PUBLIC
CREATED:20181219T103803Z
DESCRIPTION: The intimate connection between topology and quantum physics h
as been widely explored in high-energy and solid-state physics\, revealing
a plethora of remarkable physical phenomena over the years. Building on t
heir universal nature\, topological properties are currently studied in an
even broader context\, ranging from ultracold atomic gases to photonics\,
where distinct observables and probes offer a novel view on topological q
uantum matter.\nVortragende(r): Nathan Goldman
LAST-MODIFIED:20181219T103803Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room I\, EG.076
ORGANIZER;CN=Gregor Jotzu / Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Probing Topological Matter by «Heating»: From Quan
tized Circular Dichroism to Tensor Monopoles
URL;VALUE=URI:https://www.mpsd.mpg.de/events/17056/333601
END:VEVENT
END:VCALENDAR