Phonon-drag thermopower in anisotropic AlAs quantum wells

In the present work we have developed a generalized theory of phonon-drag thermopower Ŝg for a highly anisotropic two-dimensional electron gas. For electrons confined in AlAs quantum wells we calculate Ŝg as function of temperature. We show that Ŝg exhibits a strong anisotropic behavior depending on...

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Bibliographic Details
Main Authors: Lehmann, Dietmar, Tsaousidou Margarita, Shrishail, Kubakaddi
Format: Conference Proceeding
Language:English
Subjects:
ALUMINIUM ARSENIDES
ANISOTROPY
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Drag
ELECTRON GAS
ELECTRONS
GALLIUM ARSENIDES
NANOSCIENCE AND NANOTECHNOLOGY
PHONONS
QUANTUM WELLS
TEMPERATURE DEPENDENCE
Thermoelectricity
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Summary:In the present work we have developed a generalized theory of phonon-drag thermopower Ŝg for a highly anisotropic two-dimensional electron gas. For electrons confined in AlAs quantum wells we calculate Ŝg as function of temperature. We show that Ŝg exhibits a strong anisotropic behavior depending on valley occupancy which can be tuned by well width and strain. Also a great enhancement of Ŝg is observed compared to GaAs quantum wells.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4848362