Spin susceptibility of a variable-density two-dimensional electron system

被引：2
|
作者：
Zhu, J
Stormer, HL
Pfeiffer, LN
Baldwin, KW
West, KW
机构：
[1] Columbia Univ, Dept Phys, New York, NY 10027 USA
[2] Columbia Univ, Dept Appl Phys & Applied Math, New York, NY 10027 USA
[3] Lucent Technol, Bell Labs, Murray Hill, NJ 07974 USA
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2004年 / 22卷 / 1-3期
关键词：
GaAs; two-dimensional electron system; low density; spin susceptibility;
D O I：
10.1016/j.physe.2003.11.255
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We determine the spin susceptibility in a variable-density two-dimensional electron system in GaAs/AlGaAs. Our measurements extend over a wide range of low densities from 2 x 10(9) to 4 x 10(10) cm(-2). Our data can be well described by an empirical equation which incorporates both the density dependence and the magnetic field dependence of the spin susceptibility. It can explain the anomalous g-factors reported recently in GaAs electron and hole systems. The extrapolated paramagnetic spin susceptibility increases with decreasing density as expected from theoretical calculations. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：228 / 231
页数：4
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