COLLECTIVE EXCITATIONS OF A 2-COMPONENT ONE-DIMENSIONAL QUANTUM PLASMA CONFINED IN SEMICONDUCTOR QUANTUM WIRES

被引：26

作者：

HWANG, EH

DASSARMA, S

机构：

[1] Department of Physics, University of Maryland, College Park

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.50.17267

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The collective plasmon excitation spectrum of a one-dimensional electron gas confined in a GaAs quantum wire is calculated within the two-subband random-phase approximation. We calculate the collective-charge-density-excitation (CDE) dispersion assuming that both the ground and the first excited subband states are occupied by electrons. We find four different branches of CDE modes, two of which are intrasubband CDE's and the other two intersubband CDE's. The mode-coupling effect between them is investigated by introducing a parity-breaking asymmetry in the confinement potential. Our calculated mode dispersion is in excellent quantitative agreement with a recent inelastic-light-scattering experiment. © 1994 The American Physical Society.

引用

页码：17267 / 17270

页数：4

共 6 条

[1]

DZYALOSH.IE, 1973, ZH EKSP TEOR FIZ+, V65, P411

[2] ONE-DIMENSIONAL PLASMON DISPERSION AND DISPERSIONLESS INTERSUBBAND EXCITATIONS IN GAAS QUANTUM WIRES [J].