Johansson A, Herschbach C, Fedorov D V, Gradhand M, Mertig I
Institute of Physics, Martin Luther University Halle-Wittenberg, D-06099 Halle, Germany.
J Phys Condens Matter. 2014 Jul 9;26(27):274207. doi: 10.1088/0953-8984/26/27/274207. Epub 2014 Jun 17.
Recently, a generalized relativistic phase shift model was proposed (Fedorovet al 2013 Phys. Rev. B 88 085116) for the description of the skew-scattering contribution to the spin Hall effect caused by impurities. Here, we inspect this model by means of a systematic comparison with the results of first-principles calculations performed for several metallic host systems with different substitutional impurities. It is found that for its proper application, the differences between impurity and host phase shifts should be used as input parameters. Generally, the model provides good qualitative agreement with ab initio results for hosts with a free-electron-like Fermi surface and a relatively weak spin-orbit coupling, but fails otherwise.
最近，有人提出了一个广义相对论相移模型（费多罗夫等人，《物理评论B》88 085116，2013年），用于描述杂质对自旋霍尔效应的斜散射贡献。在这里，我们通过与针对几种具有不同替代杂质的金属主体系统进行的第一性原理计算结果进行系统比较，来检验这个模型。结果发现，为了正确应用该模型，应将杂质和主体相移之间的差异用作输入参数。一般来说，对于具有类自由电子费米面和相对较弱自旋轨道耦合的主体，该模型与从头算结果在定性上吻合良好，但在其他情况下则不适用。
