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arXiv 2501.02533cond-mat.mes-hallcond-mat.dis-nn
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平面反常霍尔效应中普遍的散射类

Universal classes of disorder scatterings in in-plane anomalous Hall effect

Anhui University(安徽大学);Chinese Academy of Sciences(中国科学院)

Guoao Yang, Tao Qin, Jianhui Zhou

AI总结:

研究平面反常霍尔效应中三种普遍散射类型对霍尔电导的影响,揭示散射对 extrinsic 部分的非平凡贡献。

摘要:

平面反常霍尔效应(IPAHE)在各种量子材料中具有平面霍尔电流和磁化/磁场的研究日益增加。目前的努力主要集中在内禀部分,由于电子能带的 Berry 曲率,然而,如何散射影响外在部分(斜散射和侧跳)仍不清楚。本文基于典型的二维 massive Dirac 费米子模型,考虑 warping 项和通用 Zeeman 场,理论研究了三种普遍的散射类型(标量、自旋保持和自旋翻转)。发现不同的散射导致霍尔电导对散射强度的依赖关系不同,并在某些限制下恢复了已知结果。值得注意的是,自旋翻转散射可以产生非平凡贡献,特征为正弦振荡,周期为 π 和 2π,与标准二维 massive Dirac 费米子不同。本文揭示了在存在散射时平面霍尔几何中反常传输的丰富特性,并为磁输运现象提供了有用见解。

英文摘要:

The in-plane anomalous Hall effect (IPAHE) with planar Hall current and magnetization/magnetic fields in various quantum materials has received increasing attention. Most of the current efforts are devoted to the intrinsic part due to the Berry curvature of electronic bands, however, how disorder scattering affects the extrinsic part (the skew scattering and side jump) remains largely elusive. Here we theoretically investigate the three universal classes of disorder scattering (scalar, spin-conserving, and spin-flipping) for the IPAHE, based on the prototypical two-dimensional massive Dirac fermion model with warping term under generic Zeeman fields. We find that the different disorder scattering results in a distinct dependence of the anomalous Hall conductivity on disorder strength, and we recover previously known results within some limits. Remarkably, the spin-flipping scattering could give rise to nontrivial contributions featuring sinusoidal oscillations with periods of \textgreek{π} and 2\textgreek{π} to the extrinsic part, in contrast to the standard two-dimensional massive Dirac fermions. Our work unveils the rich features of anomalous transport in planar Hall geometry in the presence of disorder scattering and provides some useful insights into the magnetotransport phenomena.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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