Bias current dependence of the spin lifetime in insulating Al0.3Ga0.7As
Bias current dependence of the spin lifetime in insulating Al0.3Ga0.7As
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绝缘 Al0.3Ga0.7As 中自旋寿命的偏置电流依赖性
DOI:
10.1063/1.4866784
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发表时间:
2014-02
影响因子:
4
通讯作者:
S. von Molnar
中科院分区:
文献类型:
--
作者:
X. Z. Yu;J. H. Zhao;P. Xiong;S. von Molnar
The spin lifetime and Hanle signal amplitude dependence on bias current has been investigated in insulating Al0.3Ga0.7As:Si using a three-terminal Hanle effect geometry. The amplitudes of the Hanle signals are much larger for forward bias than for reverse bias, although the spin lifetimes found are statistically equivalent. The spin resistance-area product shows a strong increase with bias current for reverse bias and small forward bias until 150 μA, beyond which a weak dependence is observed. The spin lifetimes diminish substantially with increasing bias current. The dependence of the spin accumulation and lifetime diminish only moderately with temperature from 5 K to 30 K.
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