Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session B25: Ultrafast Dynamics in Cooperative Systems
11:30 AM–2:30 PM,
Monday, March 6, 2023
Room: Room 217/218
Sponsoring
Unit:
DLS
Chair: Susan Dexheimer, Washington State University
Abstract: B25.00005 : Insignts into non-equilibrium spectroscopy from the theoretical perspective*
1:54 PM–2:30 PM
Presenter:
Alexander F Kemper
(North Carolina State University)
Author:
Alexander F Kemper
(North Carolina State University)
With this is mind, we examine the problem of how excited populations of electrons relax after they have been excited by a pump. We include three of the most important relaxation processes: (i) impurity scattering; (ii) Coulomb scattering; and (iii) electron-phonon scattering. The relaxation of an excited population of electrons is one of the most fundamental processes measured in pump/probe experiments, but its interpretation can be complicated. We show how to resolve four common and incorrect misconceptions about non-equilibrium relaxation.
We use these insights to help understand what time-resolved photoemission measurements actually measure.
*This work was supported by the National Science Foundation under Grant No. DMR-1752713.
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