Magnetic properties of a spin-polarized two-dimensional electron system

被引：5
|
作者：
Grundler, D
Meinel, I
Bargstadt-Franke, S
Heitmann, D
机构：
[1] Univ Hamburg, Inst Angew Phys, D-20355 Hamburg, Germany
[2] Univ Hamburg, Mikrostrukturforschungszentrum, D-20355 Hamburg, Germany
来源：
PHYSICA B-CONDENSED MATTER | 1998年 / 249卷
关键词：
magnetization; quantum Hall effect; enhanced g-factor;
D O I：
10.1016/S0921-4526(98)00291-9
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report on magnetization studies on a two-dimensional electron system (2DES) within a modulation-doped AlGaAs/GaAs-heterostructure where the carrier density can be varied via a gate bias. Oscillations of the sample's magnetization were recorded as a function of the electron density and the magnetic field. Using the Lifshitz-Kosevich theory, a minimum Dingle temperature of about 0.8 K for filling factor v = 2 is deduced from our measurements. We observe the spin-polarized state and for the first time the exchange-enhanced magnetization of the 2DES. The signal strength observed at v = 1 corresponds to an enhanced g*-factor of 14 for B > 6 T. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：693 / 696
页数：4
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