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Thermoelectric Bismuth Wire Array Composites

Published online by Cambridge University Press:  10 February 2011

T. E. Huber,
M. J. Graf and
C. A Foss
T. E. Huber
Affiliation:
Howard University, Washington, DC 20059, thuber@howard.edu, edtech01@erols.com
M. J. Graf
Affiliation:
Department of Physics, Boston College, Chestnut Hill, MA 02467, grafrn@bc.edu
C. A Foss
Affiliation:
Department of Chemistry, Georgetown University, Washington, DC, cfoss@gusun.edu
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Abstract

The resistance R of a high density array of 200 nm diameter wires in anodic alumina is studied experimentally. R decreases from 300 K down to 0.3 K. An anomalous drop in R was found at T<50 K. Possible explanations are considered, including one based on the onedimensional quantum size effect. Also, the large magnetoresistance is suggestive of weaklocalization effects. The implication for the thermoelectric properties is discussed.

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