Full calculation of inter-conversion between charge, spin, and heat current using a common partial differential equation platform
Full calculation of inter-conversion between charge, spin, and heat current using a common partial differential equation platform
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DOI：
10.1063/5.0088343
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发表时间：
2022-06
影响因子：
3.2
通讯作者：
E. Shigematsu;E. Tamura;R. Ohshima;Y. Ando;M. Shiraishi
中科院分区：
文献类型：
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作者：
E. Shigematsu;E. Tamura;R. Ohshima;Y. Ando;M. Shiraishi
我们提出了一个简单的实现计算自旋电流分布使用偏微分方程平台。通过求解多个标量势，可以很好地再现自旋注入、自旋/电荷互转换和热自旋注入现象。作为示范，我们显示自旋电流的产生和检测的铁磁，自旋传导，和自旋霍尔金属材料的复合材料。此外，我们提出了一个扩展到三维极化自旋电流的模型，并描述了导电铁磁体中自旋/电荷电流相互转换的矩阵，该矩阵允许数值再现异常和平面霍尔效应。研究发现，平面霍尔电压部分是由自旋霍尔电导率产生的，尽管其大小比各向异性磁电阻引起的小几个数量级。我们的方法将有助于进一步发展有效和可行的模拟自旋电流介导的系统。
We present a simple implementation of calculation of spin current profiles using a partial differential equation platform. By solving multiple scalar potentials, spin injection, spin/charge inter-conversion, and thermal spin injection phenomena can be well reproduced numerically. As a demonstration, we show spin current generation and detection in a composite of ferromagnetic, spin conducting, and spin-Hall-metallic materials. Furthermore, we present a model extended to three-dimensionally polarized spin current and describe the matrix for spin/charge current inter-conversion in a conductive ferromagnet, which allows for numerical reproduction of anomalous and planar Hall effects. It is found that the planar Hall voltage is in part generated by spin Hall conductivities, though its magnitude is orders smaller than that induced by the anisotropic magnetoresistance. Our method will contribute to further development of effective and feasible simulations of spin-current-mediated systems.