arxiv: 1702.08121 · v3 · pith:YBLCDTNFnew · submitted 2017-02-27 · ❄️ cond-mat.mtrl-sci

Topological semimetal state and field-induced Fermi surface reconstruction in antiferromagnetic monopnictide NdSb

Yongjian Wang , J. H. Yu , Y. Q. Wang , C. Y. Xi , L. S. Ling , S. L. Zhang , J. R. Wang , Y. M. Xiong

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Tao Han Hui Han Jun Yang Jixiang Gong Lei Luo W. Tong Lei Zhang Zhe Qu Y. Y. Han W. K. Zhu Li Pi X. G. Wan Changjin Zhang Yuheng Zhang

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keywords statesemimetaltopologicalantiferromagneticexperimentalfermifield-inducedmaterial

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We report the experimental realization of Dirac semimetal state in NdSb, a material with antiferromagnetic ground state. The occurrence of topological semimetal state has been well supported by our band structure calculations and the experimental observation of chiral anomaly induced negative magnetoresistance. A field-induced Fermi surface reconstruction is observed, in response to the change of spin polarization. The observation of topological semimetal state in a magnetic material provides an opportunity to investigate the magneto-topological phenomena.

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Topological semimetal state and field-induced Fermi surface reconstruction in antiferromagnetic monopnictide NdSb

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