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Planar Hall effect in type-II Weyl semimetal WTe2

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arxiv 1801.05929 v2 pith:BC3UI7UE submitted 2018-01-18 cond-mat.mtrl-sci

Y. J. Wang , J. X. Gong , D. D. Liang , M. Ge , J. R. Wang , W. K. Zhu , C. J. Zhang This is my paper · ORCID
classification cond-mat.mtrl-sci
keywords effecthallplanarweylsemimetaltopologicaltype-iianomaly
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Adler-Bell-Jackiw chiral anomaly is a representative feature arising from the topological nature in topological semimetal. We report the first experimental observation of giant planar Hall effect in type-II Weyl semimetal WTe2. Our comprehensive analyes of the experimental data demonstrate that the detected planar Hall effect is originated from the chiral anomaly of Weyl fermions. Unlike the somewhat elusive negative magnetoresistance, the planar Hall effect is robust and easy to be detected in type-II Weyl semimetal. This work reveals that the planar Hall effect is an effective transport probe to determine the topological nature of topological semimetals, especially in type-II Weyl semimetals.

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