Unconventional Hall Effect induced by Berry Curvature

TL;DR

This paper reports a novel in-plane Hall effect in ZrTe5 flakes caused by Berry curvature, revealing complex transport phenomena in topological materials with implications for understanding Berry phase effects.

Contribution

It demonstrates a new in-plane Hall effect in ZrTe5 and links it to Berry curvature-induced anomalous velocity in a tilted Weyl semimetal, expanding knowledge of topological transport.

Findings

Detection of symmetric and antisymmetric in-plane Hall components

Identification of Berry curvature as the origin of anomalous velocity

Enrichment of Hall effect phenomena in topological materials

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 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.