Extrinsic Spin Nernst Effect from First Principles
Extrinsic Spin Nernst Effect from First Principles
复制标题
DOI：
10.1103/physrevlett.109.026601
复制
发表时间：
2012-07-10
影响因子：
8.6
通讯作者：
Mertig, Ingrid
中科院分区：
文献类型：
--
作者：
Tauber, Katarina;Gradhand, Martin;Mertig, Ingrid
我们提出了一个从头计算描述的热输运现象称为自旋能斯特效应。它指的是横向于所施加的温度梯度的自旋累积或纯自旋电流的产生。这类似于深入研究的自旋霍尔效应所描述的内在和外在的机制，由于施加电场。类似地，自旋能斯特效应也有一些贡献。在这里，我们调查的非本征斜散射机制，这是占主导地位的限制稀合金。我们的计算是基于一个完全相对论性的Korringa-Kohn-Rostoker方法和线性玻尔兹曼方程的解决方案。作为第一个应用程序，我们考虑一个铜主机与Au，Ti和Bi杂质。
We present an ab initio description of the thermal transport phenomenon called the spin Nernst effect. It refers to generation of a spin accumulation or a pure spin current transverse to an applied temperature gradient. This is similar to the intensively studied spin Hall effect described by intrinsic and extrinsic mechanisms due to an applied electric field. Analogously, several contributions are present for the spin Nernst effect. Here we investigate the extrinsic skew scattering mechanism which is dominant in the limit of dilute alloys. Our calculations are based on a fully relativistic Korringa-Kohn-Rostoker method and a solution of the linearized Boltzmann equation. As a first application, we consider a Cu host with Au, Ti, and Bi impurities.