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BEGIN:VEVENT
DTSTAMP:20260515T173511Z
UID:https://www.mpsd.mpg.de/events/9220/17181
DTSTART:20170307T133000Z
DTEND:20170307T143000Z
CLASS:PUBLIC
CREATED:20170306T150325Z
DESCRIPTION: In light of recent experiments suggesting light-induced superc
 onductivity [1] as well as light-enhanced electron-lattice coupling [2] fo
 r strongly driven IR phonons\, it is natural to ask for a minimal and gene
 ric theoretical model that predicts such enhancement effects of important 
 couplings in different material classes. One idea that comes to mind is no
 nlinear electron-phonon coupling [3\,4]. A quadratic coupling term of the 
 form "<i> </i><i>g<sub>2</sub> n<sub>el </sub>x<sup>2</sup><sub>IR</sub></
 i> " is generically the lowest order symmetry-allowed direct coupling of a
 n IR-active phonon coordinate <i>x<sub>IR</sub></i> to the electronic dens
 ity <i>n<sub>el</sub></i> in systems with inversion symmetry. In this talk
  I will present model evidence for light-enhanced electron-phonon coupling
  and light-induced effective attraction between electrons based on nonline
 ar electron-phonon coupling [3]\, the latter of which was already discusse
 d in a similar context in [4]. [1] M. Mitrano et al.\, Nature 530\, 461 (2
 016) [2] E. Pomarico et al.\, Phys. Rev. B 95\, 024304 (2017) [3] M. A. Se
 ntef\, arXiv: 1702.00952 [4] D. M. Kennes et al.\, Nature Physics (2017) \
 , doi:10.1038/nphys4024\, arXiv:1609.03802\nSpeaker: Michael Sentef
LAST-MODIFIED:20170306T150539Z
LOCATION:CFEL (Bldg. 99)\, Room: Seminar Room IV\, O1.111
ORGANIZER;CN=Angel Rubio:mailto:
SUMMARY:MPSD Seminar:  Michael Sentef - Light-enhanced electron-phonon coup
 ling from nonlinear electron-phonon coupling 
URL;VALUE=URI:https://www.mpsd.mpg.de/events/9220/17181
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