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arXiv 0711.0519cond-mat.mes-hallcond-mat.str-el
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简并自旋极化电子气中交换作用引起的动态自旋劈裂的电控制--时间分辨Kerr转动

Electrical Control of Dynamic Spin Splitting Induced by Exchange Interaction as Revealed by Time Resolved Kerr Rotation in a Degenerate Spin-Polarized Electron Gas

F. Zhang, H. Z. Zheng, Y. Ji, J. Liu, G. R. Li

摘要:

自旋自由度的操纵已被证明在自旋极化电子等离子体中的异质结构,通过使用交换相互作用诱导的动态自旋分裂,而不是Rashba和Dresselhaus类型,所揭示的时间分辨克尔旋转。当偏压从-0.3V变化到-0.6V时,自旋分裂从0.256meV增加到0.559meV。在有偏置的情况下观察到克尔信号的符号转换和拉莫尔进动的相位反转,它们都符合交换相互作用诱导自旋分裂的理论框架。它的电控制可能为类自旋FET器件中自旋选择输运的控制提供一种新的有效方案。

英文摘要:

The manipulation of spin degree of freedom have been demonstrated in spin polarized electron plasma in a heterostructure by using exchange-interaction induced dynamic spin splitting rather than the Rashba and Dresselhaus types, as revealed by time resolved Kerr rotation. The measured spin splitting increases from 0.256meV to 0.559meV as the bias varies from -0.3V to -0.6V. Both the sign switch of Kerr signal and the phase reversal of Larmor precessions have been observed with biases, which all fit into the framework of exchange-interaction-induced spin splitting. The electrical control of it may provide a new effective scheme for manipulating spin-selected transport in spin FET-like devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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