Time-of-flight spectroscopy via spin precession: The Larmor clock and anomalous spin dephasing in silicon
Time-of-flight spectroscopy via spin precession: The Larmor clock and anomalous spin dephasing in silicon
复制标题
通过自旋进动的飞行时间光谱：拉莫尔时钟和硅中的反常自旋相移
DOI：
10.1103/physrevb.82.241202
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发表时间：
2010
影响因子：
3.7
通讯作者：
I. Appelbaum
中科院分区：
文献类型：
--
作者：
Biqin Huang;I. Appelbaum
漂移扩散理论完全描述了半导体中的电荷传输，也普遍用于模拟纵向电场存在下自旋极化电子的传输。通过在电流感应垂直传输本征硅器件中利用进动（一种称为“拉莫尔时钟”的技术）将自旋渡越时间转换为自旋方向，我们表明自旋扩散（以及伴随的自旋移相）可以在电荷扩散方面得到极大增强，这与自旋库仑阻力扩散抑制的预测形成鲜明对比。
Drift-diffusion theory - which fully describes charge transport in semiconductors - is also universally used to model transport of spin-polarized electrons in the presence of longitudinal electric fields. By transforming spin transit time into spin orientation with precession (a technique called the "Larmor clock") in current-sensing vertical-transport intrinsic Si devices, we show that spin diffusion (and concomitant spin dephasing) can be greatly enhanced with respect to charge diffusion, in direct contrast to predictions of spin Coulomb-drag diffusion suppression.