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arXiv · 1609.02297

Topological Phase Transition and Chiral-Anomaly Driven Negative Magneto-Resistance in Bulk Black Phosphorus

Chun-Hong Li·Yu-Jia Long·Ling-Xiao Zhao·Lei Shan·Zhi-An Ren·Jian-Zhou Zhao·Hong-Ming Weng·Xi Dai·Zhong Fang·Gen-Fu Chen·Cong Ren
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Abstract

We report the anisotropic magneto-transport measurement on a non-compound band semiconductor black phosphorus (BP) with magnetic field B up to 16 Tesla applied in both perpendicular and parallel to electric current I under hydrostatic pressures. The BP undergoes a topological Lifshitz transition from band semiconductor to a zero-gap Dirac semimetal state, characterized by a weak localization-weak antilocaliation transition at low magnetic fields and the emergence of a nontrivial Berry Phase of detected by SdH magneto-oscillations in magnetoresistance curves. In the transition region, we observe a pressure-dependent negative MR only in the B//I configuration. This negative longitudinal MR is attributed to the Adler-Bell-Jackiw anomaly (topological E$\cdot$B term) in the presence of weak antilocalization corrections.

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Chun-Hong Li, Yu-Jia Long, Ling-Xiao Zhao, Lei Shan, Zhi-An Ren, Jian-Zhou Zhao, Hong-Ming Weng, Xi Dai, Zhong Fang, Gen-Fu Chen, Cong Ren. 2016-09-08. Topological Phase Transition and Chiral-Anomaly Driven Negative Magneto-Resistance in Bulk Black Phosphorus. https://doi.org/10.1103/physrevb.95.125417

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