Abstract

Berry phase and Berry curvature play a key role in the development of topology in physics and do contribute to the transport properties in solid state systems. In this paper, we report the finding of novel nonzero Hall effect in topological material ZrTe₅ flakes when the in-plane magnetic field is parallel and perpendicular to the current. Surprisingly, both symmetric and antisymmetric components with respect to magnetic field are detected in the in-plane Hall resistivity. Further theoretical analysis suggests that the magnetotransport properties originate from the anomalous velocity induced by Berry curvature in a tilted Weyl semimetal. Our work not only enriches the Hall family but also provides new insights into the Berry phase effect in topological materials.

中文翻译：

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Berry曲率引起的非常规霍尔效应

摘要

Berry 相和 Berry 曲率在物理学拓扑学的发展中起着关键作用，并且确实有助于固态系统中的传输特性。在本文中，我们报告了当面内磁场平行和垂直于电流时拓扑材料 ZrTe ₅薄片中新型非零霍尔效应的发现。令人惊讶的是，在面内霍尔电阻率中检测到关于磁场的对称和反对称分量。进一步的理论分析表明，磁传输特性源于倾斜的 Weyl 半金属中 Berry 曲率引起的异常速度。我们的工作不仅丰富了霍尔家族，还为拓扑材料中的浆果相效应提供了新的见解。