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Title: Thermopower enhancement in quantum wells with the Rashba effect

We theoretically demonstrate that the thermopower in two-dimensional quantum wells (QWs) can be significantly enhanced by its Rashba spin-splitting effect, governed by the one-dimensional density of states in the low Fermi energy region. The thermopower enhancement is due to the lower Fermi level for a given carrier concentration in Rashba QWs, as compared with that in normal two-dimensional systems without the spin-splitting effect. The degenerate approximation directly shows that larger strength of Rashba effect leads to higher thermopower and consequently better thermoelectric performance in QWs.
Authors:
 [1] ;  [2] ;  [3] ; ; ; ;  [4] ;  [1] ;  [3] ;  [1]
  1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China)
  2. (United States)
  3. (China)
  4. Materials Science and Engineering Department, University of Washington, Seattle, Washington 98195 (United States)
Publication Date:
OSTI Identifier:
22392016
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; APPROXIMATIONS; DENSITY OF STATES; FERMI LEVEL; QUANTUM WELLS; SPIN; TWO-DIMENSIONAL SYSTEMS