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Giant thermopower and figure of merit of semiconducting polaronic nanolayers

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journal contribution
posted on 24.08.2010 by A.S. Alexandrov, A.M. Bratkovsky
Polarons—electrons coupled with lattice vibrations—play a key role in transport and optical properties of many semiconductors. Here, we calculate the energy spectrum and thermopower of Fröhlich polarons confined to a potential well as a function of the well thickness. We show that the polaron mass enhancement in 2+ϵ dimensions explains a giant thermoelectric power recently observed in doped semiconducting nanolayers (multiple quantum wells) and propose a route for enhancing the performance of thermoelectric energy nanoconverters by increasing their figure of merit by more than one order of magnitude.

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  • Science

Department

  • Physics

Citation

ALEXANDROV, A.S. and BRATKOVSKY, A.M., 2010. Giant thermopower and figure of merit of semiconducting polaronic nanolayers. Physical Review B, 81, 153204, 4 pp.

Publisher

© American Physical Society

Version

VoR (Version of Record)

Publication date

2010

ISSN

1098-0121

Language

en

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