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Theoretical Study of Electronic Structures of Bi2Te3/Sb2Te3 Superlattices

Published online by Cambridge University Press:  01 February 2011

Hong Li ,
Daniel Bilc  and
S. D. Mahanti
Hong Li
Affiliation:
Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48823
Daniel Bilc
Affiliation:
Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48823
S. D. Mahanti
Affiliation:
Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48823
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Abstract

To understand thermoelectric properties of multiplayer Bi2Te3/Sb2Te3 superlattices, especially their charge transport properties, electronic structure calculations were carried out using ab-initio gradient corrected density functional theory. The superlattice structures of (1,1) and (1,2) Bi2Te3/Sb2Te3 multilayers were optimized and their band structures were compared with each other. Different lattice relaxation effects are observed for the two structures. The cross-plane and inplane effective masses for both these systems are found to be comparable, consistent with experimental mobility measurements.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 793: Symposium S – Thermoelectric Materials 2003 - Research and Applications , 2003 , S8.37
Copyright
Copyright © Materials Research Society 2004

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References

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