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arXiv · 1604.00108

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

Xuefeng Wang·Xingchen Pan·Ming Gao·Jihai Yu·Juan Jiang·Junran Zhang·Huakun Zuo·Minhao Zhang·Zhongxia Wei·Wei Niu·Zhengcai Xia·Xiangang Wan·Yulin Chen·Fengqi Song·Yongbing Xu·Baigeng Wang·Guanghou Wang·Rong Zhang
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Abstract

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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Xuefeng Wang, Xingchen Pan, Ming Gao, Jihai Yu, Juan Jiang, Junran Zhang, Huakun Zuo, Minhao Zhang, Zhongxia Wei, Wei Niu, Zhengcai Xia, Xiangang Wan, Yulin Chen, Fengqi Song, Yongbing Xu, Baigeng Wang, Guanghou Wang, Rong Zhang. 2016-04-01. Evidence of both surface and bulk Dirac bands in ZrSiS and the unconventional magnetoresistance. https://arxiv.org/abs/1604.00108

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