标题： 自旋轨道扭矩的张量自旋霍尔磁阻表征 显示英文标题

标题： Characterizing Spin-Orbit Torques by Tensorial Spin Hall Magnetoresistance

摘要： 磁阻（MR）为实验研究自旋扭矩提供了一个关键工具。虽然MR在自旋霍尔效应（SHE）的器件几何结构中已被很好地确立，例如由磁性/重金属异质结构所展示的那样，但在SHE范式之外，MR的作用及其表现形式仍然难以捉摸。在这里，我们提出了一种之前未知的MR形式，其中基础的电荷-自旋转换及其逆过程违反了SHE的简单几何结构，这需要张量描述。这种新型MR可以生成一系列独特的谐波响应，这对于非SHE材料中 unconventional 自旋轨道扭矩的实验表征至关重要。我们的结果是在半金属WTe$_2$薄膜中得到验证的。 显示英文摘要

摘要： Magnetoresistance (MR) provides a crucial tool for experimentally studying spin torques. While MR is well established in the device geometry of the spin Hall effect (SHE), as exemplified by the magnet/heavy-metal heterostructures, its role and manifestation beyond the SHE paradigm remain elusive. Here we propose a previously unknown form of MR where the underlying charge-to-spin conversion and its inverse process violate the simple geometry of the SHE, calling for tensorial descriptions. This novel MR can generate a series of unique harmonic responses essential for the experimental characterization of unconventional spin-orbit torques in non-SHE materials. Our results are demonstrated in semimetal WTe$_2$ thin films.