Satellite structures in the spectral functions of the two-dimensional electron gas in semiconductor quantum wells: A GW plus cumulant study

被引：24

作者：

Lischner, Johannes ^{[1
]}

Vigil-Fowler, Derek

Louie, Steven G.

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW B | 2014年 / 89卷 / 12期

基金：

美国国家科学基金会;

关键词：

SINGLE-PARTICLE SPECTRUM; SYSTEMS; METALS;

D O I：

10.1103/PhysRevB.89.125430

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present theoretical calculations for the spectral functions and single-particle densities of states of the two-dimensional electron gas in semiconductor quantum wells at different electron densities using the GW plus cumulant method. We compare our results to GW only calculations and find significant differences in the description of the satellites between the two theories: While GW theory predicts the existence of a plasmaron excitation, no such excitation is found in GW plus cumulant theory. We compare our results to experimental tunneling spectra from semiconductor quantum wells and find good agreement for the satellite properties.

引用

页数：5

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