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

页码：693 / 696

页数：4