PGI Kolloquium:
Prof. Dr. James Freericks,
Georgetown University, Washington, D.C., USA
PGI Lecture Hall, Building 04.8, 2nd Floor, Room 365
- Anfang
- 30.11.2018 11:00 Uhr
How Do We Know When Hot Electrons Are Thermal?
Copyright: Prof. Dr. Freericks
Recent work in nonequilibrium dynamical mean-field theory has shed new light onto the criteria for thermalization, how nonequilibrium systems approach equilibrium, and the effects of strong electron correlation on the thermalization process.
I will describe recent work on how electrons thermalize after they are excited by an intense laser pulse and probed on different time scales via time-resolved angle-resolved photoemission spectroscopy. I will examine a number of different scattering mechanisms and the coupling to infinite and finite phonon baths. In particular, I will show why a hot electron spectra which is close to a Fermi-Dirac distribution is insufficient to determine whether the electrons have thermalized.
If time permits, I will also discuss some recent work on time-resolved electronic Raman scattering, which provides complimentary information to time-resolved angle-resolved photoemission spectroscopy.
