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VERSION:2.0
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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260618T014230Z
UID:https://www.mpsd.mpg.de/events/9986/42303
DTSTART:20170516T123000Z
DTEND:20170516T133000Z
CLASS:PUBLIC
CREATED:20170512T113953Z
DESCRIPTION: Advances in light sources and time resolved spectroscopy have 
 made it possible to excite specific atomic vibrations in solids and to obs
 erve the resulting changes in electronic properties but the mechanism by w
 hich phonon excitation causes qualitative changes in electronic properties
 \, has remained unclear. Here we show that the dominant symmetry-allowed c
 oupling between electron density and dipole active modes implies an electr
 on density-dependent squeezing of the phonon state which provides an attra
 ctive contribution to the electron-electron interaction\, independent of t
 he sign of the bare electron-phonon coupling and with a magnitude proporti
 onal to the degree of laser-induced phonon excitation. Reasonable excitati
 on amplitudes lead to non-negligible attractive interactions that may caus
 e significant transient changes in electronic properties including superco
 nductivity. The mechanism is generically applicable to a wide range of sys
 tems\, offering a promising route to manipulating and controlling electron
 ic phase behavior in novel materials.\nVortragende(r): Dante Kennes
LAST-MODIFIED:20170512T113953Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Angel Rubio:mailto:
SUMMARY:MPSD Seminar: Dante Kennes - Transient superconductivity from elect
 ronic squeezing of optically pumped phonons 
URL;VALUE=URI:https://www.mpsd.mpg.de/events/9986/42303
END:VEVENT
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