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Title: Phonon-drag thermopower in anisotropic AlAs quantum wells

In the present work we have developed a generalized theory of phonon-drag thermopower Ŝ{sup g} for a highly anisotropic two-dimensional electron gas. For electrons confined in AlAs quantum wells we calculate Ŝ{sup g} as function of temperature. We show that Ŝ{sup g} exhibits a strong anisotropic behavior depending on valley occupancy which can be tuned by well width and strain. Also a great enhancement of Ŝ{sup g} is observed compared to GaAs quantum wells.
Authors:
 [1] ;  [2] ;  [3]
  1. Institute of Theoretical Physics, Technische Universität Dresden, D-01062 Dresden (Germany)
  2. Materials Science Department, University of Patras, Patras 26 504 (Greece)
  3. Department of Physics, Karnatak University, Dharwad-580 003 (India)
Publication Date:
OSTI Identifier:
22261788
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1566; Journal Issue: 1; Conference: ICPS 2012: 31. international conference on the physics of semiconductors, Zurich (Switzerland), 29 Jul - 3 Aug 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; ALUMINIUM ARSENIDES; ANISOTROPY; ELECTRON GAS; ELECTRONS; GALLIUM ARSENIDES; PHONONS; QUANTUM WELLS; TEMPERATURE DEPENDENCE