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Thermoelectric Properties of Bi1-xSbx Nanowire Arrays

Published online by Cambridge University Press:  21 March 2011

Yu-Ming Lin ,
Stephen B. Cronin ,
Oded Rabin ,
Jackie Y. Ying  and
Mildred S. Dresselhaus
Yu-Ming Lin
Affiliation:
Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139
Stephen B. Cronin
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
Oded Rabin
Affiliation:
Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139
Jackie Y. Ying
Affiliation:
Department of Chemical Engineering Massachusetts Institute of Technology, Cambridge, MA 02139
Mildred S. Dresselhaus
Affiliation:
Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139 Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
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Abstract

We present here a thermoelectric transport property study of Bi1−xSbx alloy nanowires embedded in a dielectric matrix. Temperature-dependent resistance measurements exhibit nonmonotonic trends as the antimony mole fraction (x) increases, and a theoretical model is presented to explain the features that are related to the unusual band structure of Bi1−xSbx systems. Seebeck coefficient measurements are performed on nanowires with different diameters and compositions, showing enhanced thermopower over bulk Bi. The magneto-Seebeck coefficient of these nanowires also exhibits an unusual field dependence that is absent in bulk samples.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 691: Symposium G – Thermoelectric Materials 2001--Research and Applications , 2001 , G10.6
Copyright
Copyright © Materials Research Society 2002

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References

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