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Evidence of both surface and bulk Dirac bands in ZrSiS and the unconventional magnetoresistance

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arxiv 1604.00108 v1 pith:YD5F2D7A submitted 2016-04-01 cond-mat.mtrl-sci

Xuefeng Wang , Xingchen Pan , Ming Gao , Jihai Yu , Juan Jiang , Junran Zhang , Huakun Zuo , Minhao Zhang
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Zhongxia Wei Wei Niu Zhengcai Xia Xiangang Wan Yulin Chen Fengqi Song Yongbing Xu Baigeng Wang Guanghou Wang Rong Zhang
This is my paper · ORCID
classification cond-mat.mtrl-sci
keywords diracbulksurfacezrsisbandsmagnetoresistanceunconventionalangle
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The unconventional magnetoresistance of ZrSiS single crystals is found unsaturated till the magnetic field of 53 T with the butterfly shaped angular dependence. Intense Shubnikov-de Haas oscillations resolve a bulk Dirac cone with a nontrivial Berry phase, where the Fermi surface area is 1.80*10^-3 {\AA}-2 and reaches the quantum limit before 20 T. Angle resolved photoemission spectroscopy measurement reveals an electronic state with the two-dimensional nature around the X point of Brillouin zone boundary. By integrating the density functional theory calculations, ZrSiS is suggested to be a Dirac material with both surface and bulk Dirac bands.

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