General Principles for the Nonequilibrium Relaxation of Populations in Quantum Materials
Abstract
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 remains under debate. We show how several common assumptions about nonequilibrium relaxation that are pervasive in the field may not hold under quite general conditions. The analysis shows that nonequilibrium relaxation is more complex than previously thought, but it yields to recently developed theoretical methods in nonequilibrium theory. Here in this work, we show how one can use many-body theory to properly interpret and analyze these complex systems. We focus much of the discussion on implications of these results for experiment.
- Authors:
- Publication Date:
- Research Org.:
- Georgetown Univ., Washington, DC (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1477524
- Alternate Identifier(s):
- OSTI ID: 1483396
- Grant/Contract Number:
- FG02-08ER46542; AC02-05CH11231
- Resource Type:
- Journal Article: Published Article
- Journal Name:
- Physical Review. X
- Additional Journal Information:
- Journal Name: Physical Review. X Journal Volume: 8 Journal Issue: 4; Journal ID: ISSN 2160-3308
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Kemper, A. F., Abdurazakov, O., and Freericks, J. K. General Principles for the Nonequilibrium Relaxation of Populations in Quantum Materials. United States: N. p., 2018.
Web. doi:10.1103/PhysRevX.8.041009.
Kemper, A. F., Abdurazakov, O., & Freericks, J. K. General Principles for the Nonequilibrium Relaxation of Populations in Quantum Materials. United States. https://doi.org/10.1103/PhysRevX.8.041009
Kemper, A. F., Abdurazakov, O., and Freericks, J. K. 2018.
"General Principles for the Nonequilibrium Relaxation of Populations in Quantum Materials". United States. https://doi.org/10.1103/PhysRevX.8.041009.
@article{osti_1477524,
title = {General Principles for the Nonequilibrium Relaxation of Populations in Quantum Materials},
author = {Kemper, A. F. and Abdurazakov, O. and Freericks, J. K.},
abstractNote = {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 remains under debate. We show how several common assumptions about nonequilibrium relaxation that are pervasive in the field may not hold under quite general conditions. The analysis shows that nonequilibrium relaxation is more complex than previously thought, but it yields to recently developed theoretical methods in nonequilibrium theory. Here in this work, we show how one can use many-body theory to properly interpret and analyze these complex systems. We focus much of the discussion on implications of these results for experiment.},
doi = {10.1103/PhysRevX.8.041009},
url = {https://www.osti.gov/biblio/1477524},
journal = {Physical Review. X},
issn = {2160-3308},
number = 4,
volume = 8,
place = {United States},
year = {Mon Oct 15 00:00:00 EDT 2018},
month = {Mon Oct 15 00:00:00 EDT 2018}
}
Web of Science
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