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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