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BEGIN:VEVENT
DTSTAMP:20260614T072227Z
UID:https://www.mpsd.mpg.de/events/11146/17181
DTSTART:20171019T093000Z
DTEND:20171019T103000Z
CLASS:PUBLIC
CREATED:20170927T145315Z
DESCRIPTION:Putting materials out of equilibrium can produce new quantum ph
 enomena. When driven by a circularly-polarised laser\, a massless Dirac sy
 stem such as graphene can be converted into the Floquet topological insula
 tor of photon-dressed electrons\, which realises the quantum anomalous Hal
 l effect. The phase diagram becomes increasingly intricate for lower laser
  frequencies where transitions between different Chern numbers take place.
  If we consider electron correlation\, we can predict transitions between 
 Floquet topological insulators and Mott insulator[1]. In another avenue a 
 linearlypolarised light can induce the collective Higgs amplitude mode in 
 superconductors\, a condensed-matter analogue of the renowned particle. Th
 en a resonantly strong third-harmonic generation arises\, where the Higgs 
 mode contribution is shown to dominate[2] unlike in the BCS approximation.
 [1] T. Mikami et al\, Phys. Rev. B 93\, 144307 (2016).[2] R. Matsunaga et 
 al\, Phys. Rev. B 96\, 020505(R) (2017).\nSpeaker: Hideo Aoki
LAST-MODIFIED:20170928T143508Z
LOCATION:CFEL (Bldg. 99)\, Room: Seminar Room I-II\, EG.076-078
ORGANIZER;CN=Gregor Jotzu / Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar: Hideo Aoki - Quantum phases induced by polarised ligh
 t --- Floquet-topological states and Higgs modes
URL;VALUE=URI:https://www.mpsd.mpg.de/events/11146/17181
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