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Temperature and Thickness Dependences of Thermoelectric Properties of PbS/EuS Bilayers

Published online by Cambridge University Press:  21 March 2011

Elena I. Rogacheva
Affiliation:
National Technical University “Kharkov Polytechnic Institute”, Kharkov, UKRAINE
Sergey N. Grigorov
Affiliation:
National Technical University “Kharkov Polytechnic Institute”, Kharkov, UKRAINE
Tatyana V. Tavrina
Affiliation:
National Technical University “Kharkov Polytechnic Institute”, Kharkov, UKRAINE
Olga N. Nashchekina
Affiliation:
National Technical University “Kharkov Polytechnic Institute”, Kharkov, UKRAINE
Yegor O. Vekhov
Affiliation:
National Technical University “Kharkov Polytechnic Institute”, Kharkov, UKRAINE
Alexander Yu. Sipatov
Affiliation:
National Technical University “Kharkov Polytechnic Institute”, Kharkov, UKRAINE
Valentine V. Volobuev
Affiliation:
National Technical University “Kharkov Polytechnic Institute”, Kharkov, UKRAINE
Mildred S. Dresselhaus
Affiliation:
MIT, Dept of Physics, Cambridge, MA, USA
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Abstract

A non-monotonic character of the dependences of the thermoelectric properties of PbS/EuS/(001)KCl heterostructures on the PbS layer thickness d (d = 2 – 200 nm) was detected. Pronounced extrema at d ∼ 15 nm and less distinct extrema at d ∼ 30 nm and d ∼ 100 nm were observed. It is suggested that the complex character of the dependences is caused by the competition between percolation phenomena and size quantization. The critical exponent for the electrical conductivity (t = 1.6 ± 0.15) is determined.

Type
Research Article
Copyright
Copyright © Materials Research Society 2002

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References

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