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arXiv · 2311.11517

Magnetic-field-induced nonlinear transport in HfTe5

Cheng Zhang·Jinshan Yang·Zhongbo Yan·Xiang Yuan·Yanwen Liu·Minhao Zhao·Alexey Suslov·Jinglei Zhang·Li Pi·Zhong Wang·Faxian Xiu
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Abstract

The interplay of electron correlations and topological phases gives rise to various exotic phenomena including fractionalization, excitonic instability, and axionic excitation. Recently-discovered transition-metal pentatellurides can reach the ultra-quantum limit in low magnetic fields and serve as good candidates for achieving such a combination. Here, we report evidences of density wave and metal-insulator transition in HfTe5 induced by intense magnetic fields. Using the nonlinear transport technique, we detect a distinct nonlinear conduction behavior in the longitudinal resistivity within the a-c plane, corresponding to the formation of a density wave induced by magnetic fields. In high fields, the onset of the nonlinear conduction in the Hall resistivity indicates an impurity-pinned magnetic freeze-out as the possible origin of the insulating behavior. These frozen electrons can be gradually re-activated into mobile states above a threshold electric field. These experimental evidences call for further investigations into the underlying mechanism for the bulk quantum Hall effect and field-induced phase transtions in pentatellurides.

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Cheng Zhang, Jinshan Yang, Zhongbo Yan, Xiang Yuan, Yanwen Liu, Minhao Zhao, Alexey Suslov, Jinglei Zhang, Li Pi, Zhong Wang, Faxian Xiu. 2023-11-20. Magnetic-field-induced nonlinear transport in HfTe5. https://doi.org/10.1093/nsr/nwab208

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