Enhanced anisotropic magnetoresistance in the odd-parity multipole-ordered conductor Ba1－ xKxMn2As2
Enhanced anisotropic magnetoresistance in the odd-parity multipole-ordered conductor Ba1－ xKxMn2As2
复制标题
奇宇称多极有序导体Ba1－xKxMn2As2中的增强各向异性磁阻
DOI：
10.1103/physrevb.105.224422
复制
发表时间：
2022
影响因子：
3.7
通讯作者：
and K. Ohgushi
中科院分区：
文献类型：
--
作者：
T. Aoyama;M. Kudo;K. Igarashi;K. Emi;S. Kimura;Y. Imai;and K. Ohgushi
我们研究了在平面内外加磁场作用下的磁电阻，它表现出一种独特的反铁磁序，同时打破了空间反转和时间反转对称性。通过详细研究磁电阻的温度和磁场强度/方向依赖性，我们发现有三个主要贡献的磁电阻。一种是由于外场效应引起的电子回旋运动和塞曼分裂。这在0.15时最为突出.第二种是自旋涨落相关的负磁阻效应。这在100 K的铁磁转变温度下变得很大。第三种是自旋-轨道耦合效应，它导致磁电阻的面内各向异性。我们还认为，各向异性磁阻可以理解的奇宇称磁多极有序所产生的磁电效应。
We examined the magnetoresistance with applied magnetic field in theplane forwith, which exhibits a unique antiferromagnetic order with the simultaneous breaking of spatial-inversion and time-reversal symmetries. By investigating the temperature and magnetic-field strength/direction dependence of the magnetoresistance in detail, we found there are three main contributions to the magnetoresistance. One is due to an external field effect inducing cyclotron motion of electron and Zeeman splitting. This is most prominent atand 0.15. The second one is a spin fluctuation related negative magnetoresistance. This becomes large at a ferromagnetic transition temperature of 100 K at. The third one is the spin-orbit coupling related effects, which leads to an in-plane anisotropy of magnetoresistance. We also argue that anisotropic magnetoresistance can be understood in terms of the magnetoelectric effect arising from the odd-parity magnetic-multipole ordering.