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Plasmon dispersion in quantum wires at finite temperature

✍ Scribed by Vazifehshenas, T.

Book ID
105364819
Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
403 KB
Volume
205
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

We have investigated the effect of temperature on plasmon dispersion in a GaAs‐based quasi one‐dimensional electron gas (Q1DEG) by finding the roots of the temperature‐dependent dielectric function of the system in which the local field correction has been included through a generalized definition of the Hubbard approximation at low temperatures. We have compared temperature‐dependent plasmon frequencies with zero‐temperature Hubbard results and obtained an increase in plasmon energy with increasing temperature. For comparison, we have also considered the plasmon dispersion previously obtained from random phase approximation (RPA) calculations at both zero and finite temperatures. Our results show that the RPA plasma oscillations have higher energy than Hubbard approximation plasmons, not only at zero temperature but also at finite temperature. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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