Dynamical instability of a driven-dissipative electron-hole condensate in the BCS-BEC crossover region
Journal Article
·
· Physical Review B
We present a stability analysis on a driven-dissipative electron-hole condensate in the BCS (Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein-condensation)-crossover region. Extending the combined BCS-Leggett theory with the generalized random phase approximation (GRPA) to the non-equilibrium case by employing the Keldysh formalism, we show that the pumping-and-decay of carriers causes a depairing effect on excitons. This phenomenon gives rise to an attractive interaction between excitons in the BEC regime, as well as a supercurrent that anomalously flows anti-parallel to ∇θ(r) (where θ(r) is the phase of the condensate) in the BCS regime, both leading to dynamical instabilities of an exciton-BEC.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1427528
- Journal Information:
- Physical Review B, Vol. 96, Issue 12; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
Similar Records
Non-equilibrium Properties of a Pumped-Decaying Bose-Condensed Electron–Hole Gas in the BCS–BEC Crossover Region
BCS-BEC crossover in a (t2g)4 excitonic magnet
Modified many-body wave function for BCS-BEC crossover in Fermi gases
Journal Article
·
Tue Mar 01 00:00:00 EST 2016
· Journal of Low Temperature Physics
·
OSTI ID:1427528
BCS-BEC crossover in a (t2g)4 excitonic magnet
Journal Article
·
Thu Jun 18 00:00:00 EDT 2020
· Physical Review B
·
OSTI ID:1427528
+2 more
Modified many-body wave function for BCS-BEC crossover in Fermi gases
Journal Article
·
Sun Oct 15 00:00:00 EDT 2006
· Physical Review. A
·
OSTI ID:1427528