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Phonon-drag thermopower of a ballistic quantum wire

M. Tsaousidou and P. N. Butcher
Phys. Rev. B 56, R10044(R) – Published 15 October 1997
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Abstract

The phonon-drag thermopower Sg of a quasi-one-dimensional ballistic quantum wire is calculated by using the Onsager relation to relate Sg to the phonon-drag contribution to Q/ΔV, where Q is the heat flux produced by a small voltage difference ΔV across the wire. A general formula is derived for Sg and numerical results are presented for when two electronic subbands are involved. The dependence of Sg on the wire width exhibits peaks similar to those shown by the diffusion thermopower Sd. It is found, however, that the Sg maxima are up to 50–100 times larger than the corresponding ones for Sd when T=110 K. The dominance of Sg is apparent for all the values of the wire width and temperatures investigated.

  • Received 19 June 1997

DOI:https://doi.org/10.1103/PhysRevB.56.R10044

©1997 American Physical Society

Authors & Affiliations

M. Tsaousidou and P. N. Butcher

  • Physics Department, University of Warwick, Coventry CV4 7AL, United Kingdom

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Issue

Vol. 56, Iss. 16 — 15 October 1997

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