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

Citation
I. Vurgaftman et al., Thermoelectric and magnetotransport properties of Bi1-xSbx thin films and Bi/CdTe superlattices, J PHYS-COND, 11(26), 1999, pp. 5157-5167
Citations number
32
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN journal
0953-8984 → ACNP
Volume
11
Issue
26
Year of publication
1999
Pages
5157 - 5167
Database
ISI
SICI code
0953-8984(19990705)11:26<5157:TAMPOB>2.0.ZU;2-U
Abstract
The magnetotransport properties of Bi1-xSbx thin films (x = 0, 0.09 and 0.1 6) and Bi/CdTe superlattices have been determined by applying the quantitat ive mobility spectrum analysis (QMSA) and multicarrier fitting to the magne tic-field-dependent resistivities and Hall coefficients, using algorithms w hich account for the strong anisotropy of the mobilities. The experimentall y derived electron and hole densities and mobilities are then used as the i nput to a nonparabolic and anisotropic band model that derives the thermal occupations and relaxation times for L-valley electrons and holes as well a s T-valley and H-valley holes. This allows a calculation of the thermoelect ric 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 pr ofile must be assumed.