Negative absolute conductivity in photoexcited metals
Journal Article
·
· Physical Review B
- Columbia Univ., New York, NY (United States); Columbia University
- Columbia Univ., New York, NY (United States); The Flatiron Inst., New York, NY (United States)
- Columbia Univ., New York, NY (United States)
We show that in a model of a metal photoexcited by a transient pump pulse resonant with a phonon mode, the absolute dc conductivity may become negative, depending on the interplay between the electronic structure, the phonon frequency, and the pump intensity. Here, the analysis includes the effects of inelastic scattering and thermal relaxation. Results for the time evolution of the negative conductivity state are presented; the associated nonequilibrium physics may persist for long times after the pulse. Our findings provide a theoretical justification for previously proposed phenomenology and indicate new routes to the generation and exploration of intrinsically nonequilibrium states.
- Research Organization:
- Columbia Univ., New York, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- SC0018218
- OSTI ID:
- 1582397
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 4 Vol. 101; ISSN 2469-9950; ISSN PRBMDO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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