Magnetic Control of Spin-Orbit Fields: A First-Principles Study of Fe/GaAs Junctions
Magnetic Control of Spin-Orbit Fields: A First-Principles Study of Fe/GaAs Junctions
复制标题
DOI：
10.1103/physrevlett.111.036603
复制
发表时间：
2013-07-17
影响因子：
8.6
通讯作者：
Fabian, Jaroslav
中科院分区：
文献类型：
--
作者：
Gmitra, Martin;Matos-Abiague, Alex;Fabian, Jaroslav
从第一性原理出发，揭示了Fe/GaAs界面自旋轨道场的微观结构。基于对称性的方法使我们能够获得自旋轨道场的大小和方向，为一个通用的布洛赫状态，从电子能带结构的任何面内磁化方向。它表明，自旋轨道场不仅取决于跨界面的电场，但也令人惊讶地强烈的Fe磁化方向，打开其磁控制的前景。这些结果为研究铁磁/非磁异质结中的自旋轨道输运和光学现象提供了重要线索。
The microscopic structure of spin-orbit fields for the technologically important Fe/GaAs interface is uncovered from first principles. A symmetry based method allows us to obtain the spin-orbit fields-both their magnitude and orientation-for a generic Bloch state, from the electronic band structure for any in-plane magnetization orientation. It is demonstrated that the spin-orbit fields depend not only on the electric field across the interface, but also surprisingly strongly on the Fe magnetization orientation, opening prospects for their magnetic control. These results give important clues in searching for spin-orbit transport and optical phenomena in ferromagnet/nonmagnet heterostructures.