Abstract

A spin-depolarized electron system with filling factor ν = 1 in a GaAs quantum well is investigated according to time-resolved Kerr rotation. A transition from a new spin-correlated state to one with the low spin stiffness characteristic of a single-particle electron system is observed at temperatures above 5 K. A nonlinear contribution to the Larmor oscillations decay is distinguished at low temperatures, where spin–spin correlations determine the ground state of a two-dimensional electron system. The parameters of the fluctuating magnetic field acting on individual electron spins are determined.

中文翻译：

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基于时间分辨磁光克尔旋转的部分自旋极化二维电子系统的研究

摘要

根据时间分辨的Kerr旋转研究了GaAs量子阱中填充因子ν= 1的自旋去极化电子系统。在高于5 K的温度下，观察到从新的自旋相关状态到具有单粒子电子系统低自旋刚度特性的过渡。在低温下，自旋-自旋明显地引起了拉莫尔振荡衰减的非线性贡献。相关性决定了二维电子系统的基态。确定作用在各个电子自旋上的波动磁场的参数。