MANY-BODY EFFECTS ON THE SYMMETRICAL-ANTISYMMETRIC GAP IN DOUBLE QUANTUM-WELLS IN STRONG MAGNETIC-FIELDS

被引：8

作者：

BREY, L

机构：

[1] Departamento Fisica Materia Condensada C-XII, Facultad de Ciencias, Universidad Autónoma

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.47.4585

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the effect of the electron-electron interaction on the symmetric-antisymmetric energy gap in double quantum well systems in strong magnetic field at total filling factor nu = 1. We sum self-energy diagrams up to second order, and also we evaluate the self-energy in the GWGAMMA approximation. We find that in the GWGAMMA approximation the symmetric-antisymmetric energy gap collapses when the charge-density excitation develops a soft mode. Then the charge-density wave instability, which occurs in the double quantum well system at nu = 1, is accompanied by a transition to a metallic system.

引用

页码：4585 / 4591

页数：7

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