Effects of screening on the Hofstadter butterfly

被引：53

作者：

Gudmundsson, V ^{[1
]}

Gerhardts, RR ^{[1
]}

机构：

[1] MAX PLANCK INST FESTKORPERFORSCH, D-70569 STUTTGART, GERMANY

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.52.16744

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study, within the Hartree approximation, the effects of the electron-electron interaction on the energy spectrum of a two-dimensional electron gas in a perpendicular homogeneous magnetic field and a lateral superlattice potential with square symmetry. Due to the strong screening effects, the bandwidth of the Landau bands oscillates strongly with their filling. For short enough periods and strong enough modulation of the superlattice potential, the miniband structure of the Landau bands can be resolved in the thermodynamic density of states.

引用

页码：16744 / 16752

页数：9

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