González-Hernández Rafael, Ritzinger Philipp, Výborný Karel, Železný Jakub, Manchon Aurélien
Grupó de Investigación en Física Aplicada, Departamento de Física, Universidad del Norte, Barranquilla, Colombia.
Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00, Praha 6, Czech Republic.
Nat Commun. 2024 Sep 3;15(1):7663. doi: 10.1038/s41467-024-51565-6.
The Edelstein effect is the origin of the spin-orbit torque: a current-induced torque that is used for the electrical control of ferromagnetic and antiferromagnetic materials. This effect originates from the relativistic spin-orbit coupling, which necessitates utilizing materials with heavy elements. Here, we show that in magnetic materials with non-collinear magnetic order, the Edelstein effect and, consequently, a current-induced torque can exist even in the absence of the spin-orbit coupling. Using group symmetry analysis, model calculations, and realistic simulations on selected compounds, we identify large classes of non-collinear magnet candidates and demonstrate that the current-driven torque is of similar magnitude as the celebrated spin-orbit torque in conventional transition metal structures. We also show that this torque can exist in an insulating material, which could allow for highly efficient electrical control of magnetic order.
一种电流感应矩，用于对铁磁和反铁磁材料进行电控制。这种效应源于相对论性自旋轨道耦合，这就需要使用含有重元素的材料。在此，我们表明，在具有非共线磁序的磁性材料中，即使没有自旋轨道耦合，埃德尔斯坦效应以及因此产生的电流感应矩也可能存在。通过对选定化合物进行群对称性分析、模型计算和实际模拟，我们确定了大量非共线磁体候选物，并证明电流驱动矩的大小与传统过渡金属结构中著名的自旋轨道矩相似。我们还表明，这种矩可以存在于绝缘材料中，这可能实现对磁序的高效电控制。
