Kalenderansicht

März 2019
Mo Di Mi Do Fr Sa So
1 2 3
4 5 6 7 8 9 10
11 12 13 14 15 16 17
18
Faran Irshad

von 14:00 bis 15:00 Uhr

19 20 21 22 23 24
25 26
Marein Rahn

von 11:00 bis 12:00 Uhr

Giacomo Mazza

von 14:00 bis 15:00 Uhr

27
Kazuhiro Yabana

von 14:00 bis 15:00 Uhr

28 29 30 31

Aktuelles

Veranstaltungen

Hier finden Sie bevorstehende Veranstaltungen des MPSDs.

MPSD Seminar

Cooperative valence dynamics in Anderson Lattices observed by resonant inelastic x-ray scattering

In rare earth intermetallics with weakly bound f-electrons and a Kondo energy scale much larger than magnetic exchange interactions or crystal field splittings, the screening of local moments may result in a non-magnetic Fermi liquid ground state [1]. At low temperatures, the quantum fluctuations between magnetic and non-magnetic valence configurations can then acquire a cooperative (lattice) character. On a phenomenological basis, 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 challenge [2]. In experiment, the cooperative character of Anderson Lattices has only recently become directly accessible. Momentum-resolved spectroscopies, such as angle-resolved photoemission and inelastic neutron scattering, reveal the emergence of characteristic low-energy quasiparticle dynamics at low temperatures [3]. These methods probe single-particle excitations in the charge and magnetic channels, respectively. By contrast, high-resolution resonant inelastic x-ray scattering (RIXS) experiments couple 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 Kramers-Heisenberg term on a basis of strongly correlated f-electronic bands are achieved, RIXS may unlock unprecedented microscopic insights into the entanglement of local and itinerant charge and magnetic degrees of freedom. This would address a fundamental mechanism of quantum matter, with relevance far beyond lanthanides and actinides. I will review previous spectroscopic investigations of intermediate valence materials, present our recent RIXS results on the archetypal Anderson Lattice compound CePd3, and highlight some ideas for future x-ray scattering studies at 3rd and 4th generation light sources. [mehr]

MPSD Seminar

Coherent states of light and ordered states of matter in cavity QED

Collective phenomena originating from interactions between light and matter have become a major focus of interest spanning different fields of research. [mehr]

MPSD Seminar

Ab-initio description for propagation of extreme light pulse in solids: recent progresses

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 nonlinear electron dynamics in solids, and the nonlinear polarization that arises from the electron dynamics affects the propagation of the light pulse. [mehr]

Reimar Lüst Lecture

17974 1552052227

Reimar Lüst Lecture -Prof. Charles Kane: Symmetry, topology and electronic phases of matter

At the MPSD, scientists use ultra-short light flashes to study the structure as well as the atomic and electron movements of matter. These dynamic phenomena are probed with light pulses in the femto- and attosecond range – in other words, in a billionth of a millionth of a second. [mehr]

 
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