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Oscillatory thickness dependences of the Seebeck coefficient in nanostructures based on compounds IV–VI

Published online by Cambridge University Press:  16 February 2012

Dmytro M. Freik ,
Igor K. Yurchyshyn ,
Volodymyr Yu. Potyak  and
Yuriy V. Lysiuk
Dmytro M. Freik
Affiliation:
Physics and Chemistry Institute, PreCarpathian Vasyl Stefanyk National University, Ivano-Frankivsk 76018, Ukraine
Igor K. Yurchyshyn*
Affiliation:
Physics and Chemistry Institute, PreCarpathian Vasyl Stefanyk National University, Ivano-Frankivsk 76018, Ukraine
Volodymyr Yu. Potyak
Affiliation:
Physics and Chemistry Institute, PreCarpathian Vasyl Stefanyk National University, Ivano-Frankivsk 76018, Ukraine
Yuriy V. Lysiuk
Affiliation:
Physics and Chemistry Institute, PreCarpathian Vasyl Stefanyk National University, Ivano-Frankivsk 76018, Ukraine
*
a)Address all correspondence to this author. e-mail: igoor2010@gmail.com
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Abstract

The thermoelectric parameters have been investigated depending on the thickness of the layer of nanostructures IV–VI (PbS, PbSe, PbTe, and SnTe). Based on the theoretical model of quantum well (QW) with infinitely high walls, it is demonstrated that this model explains nonmonotonous behavior of the Seebeck coefficient S with the change of the well width. On the basis of oscillation period Δdexp, we have approached the theoretical d-dependence of the coefficient S to the experimental one and defined the value of the Fermi energy in the corresponding nanostructures. It has been established that the minimum QW width dmin, where the first energy level coincides with the Fermi energy, is equal to the oscillation period of the Seebeck coefficient in this structure.

Keywords

NanostructureThermoelectricityElectrical properties
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 8 , 28 April 2012 , pp. 1157 - 1163
Copyright
Copyright © Materials Research Society 2012

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References

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