Nonlinear Spin Polarization Dependence of Spin Susceptibility in Interacting Two-Dimensional Electron Systems

被引：0

作者：

Yang, K. F. ^{[1
]}

Liu, H. W. ^{[1
]}

Nagase, K. ^{[1
]}

Amakata, K. ^{[1
]}

Mishima, T. D. ^{[1
]}

Santos, M. B. ^{[1
]}

Hirayama, Y. ^{[1
]}

机构：

[1] ERATO Nucl Spin Elect Project, Sendai, Miyagi 9808578, Japan

来源：

PHYSICS OF SEMICONDUCTORS: 30TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS | 2011年 / 1399卷

关键词：

spin susceptibility; InSb;

D O I：

10.1063/1.3666558

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We measure the spin polarization (P) of two-dimensional electron gases confined to an InSb quantum well using parallel and tilted magnetic fields. The nonlinear field dependence of P is prominent, leading to a direct deduction of the spin susceptibility (chi(s)) over a wide range of P from 0.07 to 1. chi(s) is found to increase nonlinearly with P and exceed chi(gm) infinity m*g* (where m* and g* are the effective mass and g factor) as commonly used in experiments. We show that chi(s) and chi(gm) obey a square law chi(s)/chi(0) = (chi(gm)/chi(0))(2), where chi(0) is the paramagnetic spin susceptibility.

引用

页数：2

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