Thermoelectric and magnetotransport properties of Bi1-xSbx thin films and Bi/CdTe superlattices

I. Vurgaftman*, J. R. Meyer, C. A. Hoffman, S. Cho, A. DiVenere, G. K. Wong, John B Ketterson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The magnetotransport properties of Bi1-xSbx thin films (x = 0, 0.09 and 0.16) and Bi/CdTe superlattices have been determined by applying the quantitative mobility spectrum analysis (QMSA) and multicarrier fitting to the magnetic-field-dependent resistivities and Hall coefficients, using algorithms which account for the strong anisotropy of the mobilities. The experimentally derived electron and hole densities and mobilities are then used as the input to a nonparabolic and anisotropic band model that derives the thermal occupations and relaxation times for L-valley electrons and holes as well as T-valley and H-valley holes. This allows a calculation of the thermoelectric properties for comparison with experimental results. While the data for a Bi thin film and Bi/CdTe superlattices are reproduced quite well without any adjustable parameters, for Bi1-xSbx thin films a non-uniform doping profile must be assumed.

Original languageEnglish (US)
Pages (from-to)5157-5167
Number of pages11
JournalJournal of Physics Condensed Matter
Volume11
Issue number26
DOIs
StatePublished - Jul 5 1999

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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