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The Chiral Anomaly and Ultrahigh Mobility in Crystalline HfTe5

HfTe5 is predicted to be a promising platform for studying topological phases. Here through an electrical transport study, we present the first observation of chiral anomaly and ultrahigh mobility in HfTe5 crystals. Negative magneto-resistivity in HfTe5 is observed when the external magnetic and electrical fields are parallel (B//E) and quickly disappears once B deviates from the direction of E. Quantitative fitting further confirms the chiral anomaly as the underlying physics. Moreover, by analyzing the conductivity tensors of longitudinal and Hall traces, ultrahigh mobility and ultralow carrier density are revealed in HfTe5, which paves the way for potential electronic applications.

preprint2015arXivOpen access
Huichao WangChao-Kai LiHaiwen LiuJiaqiang YanJunfeng WangJun LiuZiquan LinYanan LiYong WangLiang LiDavid MandrusX. C. XieJi FengJian Wang
cond-mat.mtrl-sci
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Open access14 authors1 topic
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Huichao WangChao-Kai LiHaiwen LiuJiaqiang YanJunfeng WangJun LiuZiquan LinYanan LiYong WangLiang LiDavid MandrusX. C. XieJi FengJian Wang

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