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One-dimensional antilocalization of electrons from spin disorder probed by nonlinear Hall effect
Physical Review B ( IF 3.7 ) Pub Date : 2020-09-23 , DOI: 10.1103/physrevb.102.125430
Yang Wang , Yong Wang , Tao Wang , Xinhao Wang , Yusheng Ou , Yi Ji , Matthew F. Doty , Stephanie A. Law , John Q. Xiao

In recent years, nonreciprocal transport measurement has emerged as a probe of spin orbit interaction, spin texture, superconductivity, and other fundamental properties of materials. Here, we study the nonlinear Hall effect (NLHE) in Bi2Se3/CoFeB heterostructures measured by second harmonic voltage method. Magneto-optical Kerr effect measurements demonstrate the origin of the NLHE to be the asymmetric magnon scattering mechanism. Moreover, a linear relation between the nonlinear Hall resistance and the electron phase coherence length of Bi2Se3 is observed between 5 and 50 K. We propose a phenomenological model that explains the enhancement of the NLHE below 50 K as a result of one-dimensional antilocalization of electrons from spin disorder, enabled by spin-momentum locking and conservation of angular momentum.

中文翻译:

非线性霍尔效应探测自旋失序电子的一维反定位

近年来,不可逆的传输测量已经成为自旋轨道相互作用,自旋织构,超导性和其他材料基本性质的探究。在这里,我们研究非线性霍尔效应(NLHE)23/钴铁硼二次谐波电压法测量的异质结构。磁光克尔效应测量结果证明了NLHE的起源是不对称的磁振子散射机制。此外,非线性霍尔电阻与电子的相干长度之间存在线性关系。23 在5至50 K之间观察到。我们提出了一种现象学模型,该模型解释了由于自旋动量锁定和角动量守恒而引起的自旋紊乱的电子的一维反定位导致的50 K以下NLHE的增强。
更新日期:2020-09-23
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