Relativistic effects in scattering of polarized electrons
Relativistic effects in scattering of polarized electrons
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DOI：
10.1209/0295-5075/103/47003
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发表时间：
2013-08
期刊：
影响因子：
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通讯作者：
O. Sushkov;A. Milstein;M. Mori;S. Maekawa
中科院分区：
文献类型：
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作者：
O. Sushkov;A. Milstein;M. Mori;S. Maekawa
左右不对称（斜散射）和侧向跳跃效应是极化电子散射中自旋 - 轨道相互作用的表现形式。虽然侧向跳跃效应不如左右不对称那么广为人知，但该效应对于一般的自旋 - 轨道物理具有概念上的重要性，并且在自旋电子学中被广泛讨论。我们重新审视了侧向跳跃效应，考虑了原子/杂质/主体原子核内部精确的非微扰电子波函数。我们发现该效应的大小比文献中所接受的估计值要小得多。缩减因子为$1/Z^2$，其中$Z$是核电荷数。这意味着侧向跳跃效应实际上无关紧要，斜散射和/或内禀机制总是主导电子束的横向偏转，因此主导反常霍尔效应和自旋霍尔效应。
The right-left asymmetry (skew scattering) and the side jump effect are manifestations of the spin-orbit interaction in scattering of polarized electrons. While the side jump effect is less known than the right-left asymmetry, the effect is of conceptual importance for generic spin-orbital physics, and the effect is widely discussed in spintronics. We reexamine the side jump effect accounting for the exact nonperturbative electron wave function inside the atom/impurity/host atomic core. We find that the size of the effect is much smaller than estimates accepted in the literature. The reduction factor is , where Z is the nuclear charge. This implies that the side jump effect is practically irrelevant, the skew scattering and/or the intrinsic mechanism always dominate the transverse deflection of the electron beam and hence dominate the anomalous Hall and spin Hall effects.