Quasiparticle properties of a coupled quantum-wire electron-phonon system

被引：8

作者：

Hwang, EH ^{[1
]}

Hu, BYK ^{[1
]}

DasSarma, S ^{[1
]}

机构：

[1] TECH UNIV DENMARK,MIKROELEKTRON CTR,DK-2800 LYNGBY,DENMARK

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.54.4996

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study leading-order many-body effects of longitudinal-optical phonons on electronic properties of one-dimensional quantum-wire systems. We calculate the quasiparticle properties of a weakly polar one-dimensional electron gas in the presence of both electron-phonon and electron-electron interactions, The leading-order dynamical screening approximation (GW approximation) is used to obtain the electron self-energy, the quasiparticle spectral function, and the quasiparticle damping rate in our calculation by treating electrons and phonons on an equal footing. Our theory includes effects (within the random-phase approximation) of Fermi statistics, Landau damping, plasmon-phonon mode coupling, phonon renormalization, dynamical screening, and impurity scattering. In general, electron-electron and electron-phonon many-body renormalization effects are found to be nonmultiplicative and nonadditive in our theoretical results for quasiparticle properties.

引用

页码：4996 / 5005

页数：10

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