Observation of the spin hall effect in semiconductors

被引:2186
作者
Kato, YK [1 ]
Myers, RC [1 ]
Gossard, AC [1 ]
Awschalom, DD [1 ]
机构
[1] Univ Calif Santa Barbara, Ctr Spinatron & Quantum Computat, Santa Barbara, CA 93106 USA
关键词
D O I
10.1126/science.1105514
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Electrically induced electron-spin polarization near the edges of a semiconductor channel was detected and imaged with the use of Kerr rotation microscopy. The polarization is out-of-plane and has opposite sign for the two edges, consistent with the predictions of the spin Hall effect. Measurements of unstrained gallium arsenide and strained indium gallium arsenide samples reveal that strain modifies spin accumulation at zero magnetic field. A weak dependence on crystal orientation for the strained samples suggests that the mechanism is the extrinsic spin Hall effect.
引用
收藏
页码:1910 / 1913
页数:4
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