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arXiv · 1506.03190

Chiral anomaly induced negative magnetoresistance in topological Weyl semimetal NbAs

Xiaojun Yang·Yupeng Liu·Zhen Wang·Yi Zheng·Zhu-an Xu
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Abstract

In this paper, we report the intercone transport of Weyl fermions in NbAs with external magnetic field in parallel to electric field, a quantum phenomenon known as the Adler-Bell-Jackiw anomaly. Surprisingly, the resulting negative magnetoresistance (MR) in NbAs shows significant difference from NbP. The observed low-field positive MR dip, which is missing in NbP at low temperatures, indicates that the spin-orbital coupling (SOC) is significantly stronger in NbAs than in the former. The results imply that the contribution of arsenic to SOC in TaAs and NbAs is not negligible.

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Xiaojun Yang, Yupeng Liu, Zhen Wang, Yi Zheng, Zhu-an Xu. 2015-06-10. Chiral anomaly induced negative magnetoresistance in topological Weyl semimetal NbAs. https://arxiv.org/abs/1506.03190

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