Enhanced magnetization at integer quantum Hall states

被引：15

作者：

Meinel, I

Grundler, D

Heitmann, D

Manolescu, A

Gudmundsson, V

Wegscheider, W

Bichler, M

机构：

[1] Univ Hamburg, Inst Angew Phys, D-20355 Hamburg, Germany

[2] Univ Hamburg, Zentrum Mikrostrukturforsch, D-20355 Hamburg, Germany

[3] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland

[4] Inst Natl Fiz Mat, Bucharest, Romania

[5] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany

[6] Univ Regensburg, D-93053 Regensburg, Germany

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.64.121306

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on enhancements in the magnetization of two-dimensional electron systems in the quantum Hall regime. The observed discontinuities in the magnetization exceed the predictions for interacting electrons calculated in the Hartree-Fock approximation where only the exchange enhancement of the energy gaps is taken into account. We attribute the further enhancement to many-body correlation effects, i.e., filling factor dependent screening within the screened Hartree-Fock approximation. With this, the discontinuities in the magnetization no longer reflect the discontinuities of the chemical potential, but its behavior in the vicinity of integer filling factors.

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页数：4

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