PHONON-LIMITED MOBILITY IN A FREE-STANDING POLAR SEMICONDUCTOR QUANTUM WIRE
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Published:1995-11-20
Issue:26n27
Volume:09
Page:1779-1788
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ISSN:0217-9849
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Container-title:Modern Physics Letters B
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language:en
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Short-container-title:Mod. Phys. Lett. B
Affiliation:
1. Institute of Physics, P.O. Box 429 Boho, Hanoi 10000, Vietnam
Abstract
A macroscopic continuum model is used to study the longitudinal optical phonons in a free-standing polar quantum wire with a rectangular cross section. The Fröhlich Hamiltonian describing the electron-phonon interaction is then obtained and used to calculate the electron mobility governed by confined LO phonons by means of the memory function approach, neglecting electron-electron interaction. Numerical calculations are given for a GaAs quantum wire, showing that the mobility is enhanced at least by one order of magnitude in comparison with the bulk-LO-phonon-limited one. It is shown that the contribution of intersubband scattering is important in wires of large width at high temperature.
Publisher
World Scientific Pub Co Pte Lt
Subject
Condensed Matter Physics,Statistical and Nonlinear Physics