Spin accumulation without spin current
Spin accumulation without spin current
复制标题
无自旋电流的自旋积累
DOI：
10.1103/physrevb.105.l201202
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发表时间：
2022
影响因子：
3.7
通讯作者：
Atsuo Shitade and Gen Tatara
中科院分区：
文献类型：
--
作者：
K. Nishigomi;A. Kumatani;K. Tsukagoshi;and K. Wakabayashi;Atsuo Shitade and Gen Tatara
自旋霍尔（SH）效应是一种自旋电流垂直于外加电场流动并导致边界处自旋积累的现象。然而，在存在自旋轨道耦合的情况下，自旋电流并未得到很好的定义。在这里，我们计算对自然出现在边界处的电场梯度的自旋响应。我们使用布洛赫波函数和唯象弛豫时间推导出一个通用公式。我们还计算了一阶玻恩近似内具有非磁无序函数的均匀 Rashba 模型的响应和相应的顶点校正。尽管 SH 电导率完全消失，但我们发现了非零自旋累积。
The spin Hall (SH) effect is a phenomenon in which the spin current flows perpendicular to an applied electric field and causes the spin accumulation at the boundaries. However, in the presence of spin-orbit couplings, the spin current is not well defined. Here, we calculate the spin response to an electric-field gradient, which naturally appears at the boundaries. We derive a generic formula using the Bloch wave functions and the phenomenological relaxation time. We also calculate the response for the uniform Rashba model with-function nonmagnetic disorder within the first-order Born approximation and corresponding vertex corrections. We find the nonzero spin accumulation, although the SH conductivity exactly vanishes.
影响因子：
56.9
作者：
Murakami, S;Nagaosa, N;Zhang, SC
通讯作者：
Zhang, SC