On Critical Velocities in Exciton Superfluidity

Preprint

4 April 1997

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9704033

Abstract

The presence of exciton phonon interactions is shown to play a key role in the exciton superfluidity. We apply the Landau criterion for an exciton-phonon condensate moving uniformly at zero temperature. It turns out that there are essentially two critical velocities in the theory. Within the range of these velocities the condensate can exist only as a bright soliton. The excitation spectrum and differential equations for the wave function of this condensate are derived.

Keywords

DIFFERENTIAL EQUATIONS
EQUATIONS FOR THE WAVE
EXCITON SUPERFLUIDITY
CRITICAL VELOCITIES
EXCITON PHONON
SUPERFLUIDITY
CONDENSATE
SOLITON
PHONON

All Related Versions

Version 1, 1997-04-04, ArXiv
Published version: Physical Review Letters, 78 (15), 3011.

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