Rayleigh surface wave interaction with the 2D exciton Bose-Einstein condensate

Journal Article · Mon Jun 15 00:00:00 EDT 2015 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776115060047· OSTI ID:22472224

Boev, M. V.

We describe the interaction of a Rayleigh surface acoustic wave (SAW) traveling on the semiconductor substrate with the excitonic gas in a double quantum well located on the substrate surface. We study the SAW attenuation and its velocity renormalization due to the coupling to excitons. Both the deformation potential and piezoelectric mechanisms of the SAW-exciton interaction are considered. We focus on the frequency and excitonic density dependences of the SAW absorption coefficient and velocity renormalization at temperatures both above and well below the critical temperature of Bose-Einstein condensation of the excitonic gas. We demonstrate that the SAW attenuation and velocity renormalization are strongly different below and above the critical temperature.

• OSTI ID: 22472224
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 120, Issue 6; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
ATTENUATION
BOSE-EINSTEIN CONDENSATION
COUPLING
CRITICAL TEMPERATURE
DEFORMATION
EXCITONS
PIEZOELECTRICITY
POTENTIALS
QUANTUM WELLS
RENORMALIZATION
SEMICONDUCTOR MATERIALS
SOUND WAVES
SUBSTRATES
SURFACES
WAVE PROPAGATION