Sign up to save your podcasts
Or
Share Condensed Matter Theory Seminar: Electronic Squeezing of Pumped Phonons: Negative U and Transient Superconductivity
Share to email
Share to Facebook
Share to X
Share to email
Share to Facebook
Share to X
Or
Condensed Matter Theory Seminar: Electronic Squeezing of Pumped Phonons: Negative U and Transient Superconductivity
Twentyfirst Arnold Sommerfeld Lecture Series, Advances in light sources and time resolved spectroscopy have made it
possible to excite specific atomic vibrations in solids and to observe the
resulting changes in electronic properties. I argue that in narrow-band
systems the dominant symmetry-allowed coupling between electron density
and dipole active modes implies an electron density-dependent squeezing of
the phonon state which provides an attractive contribution to the electron-electron
interaction, independent of the sign of the bare electron-phonon
coupling and with a magnitude proportional to the degree of laser-induced
phonon excitation. Reasonable excitation amplitudes lead to non-negligible
attractive interactions that may cause significant transient changes in
electronic properties including superconductivity. The mechanism is
generically applicable to a wide range of systems, offering a promising route
to manipulating and controlling electronic phase behavior in novel materials.
View all episodes
By The Arnold Sommerfeld Center for Theoretical Physics (ASC)Twentyfirst Arnold Sommerfeld Lecture Series, Advances in light sources and time resolved spectroscopy have made it
possible to excite specific atomic vibrations in solids and to observe the
resulting changes in electronic properties. I argue that in narrow-band
systems the dominant symmetry-allowed coupling between electron density
and dipole active modes implies an electron density-dependent squeezing of
the phonon state which provides an attractive contribution to the electron-electron
interaction, independent of the sign of the bare electron-phonon
coupling and with a magnitude proportional to the degree of laser-induced
phonon excitation. Reasonable excitation amplitudes lead to non-negligible
attractive interactions that may cause significant transient changes in
electronic properties including superconductivity. The mechanism is
generically applicable to a wide range of systems, offering a promising route
to manipulating and controlling electronic phase behavior in novel materials.
More shows like Sommerfeld Lecture Series (ASC)
View all
Tonspur Forschung
3 Listeners
Fakultät für Philosophie, Wissenschaftstheorie und Religionswissenschaft - Digitale Hochschulschriften der LMU
0 Listeners
MCMP – Mathematical Philosophy (Archive 2011/12)
6 Listeners
Hegel lectures by Robert Brandom, LMU Munich
6 Listeners
Center for Advanced Studies (CAS) Cutting Edge - SD
0 Listeners
MCMP – Philosophy of Science
2 Listeners
MCMP
2 Listeners
Fakultät für Chemie und Pharmazie - Digitale Hochschulschriften der LMU - Teil 05/06
0 Listeners
Women Thinkers in Antiquity and the Middle Ages - SD
0 Listeners