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Nontrivial Berry phase and type II Dirac transport in layered material PdTe2

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arxiv 1611.08112 v2 pith:V4UCL4GD submitted 2016-11-24 cond-mat.mes-hall

Fucong Fei , Xiangyan Bo , Rui Wang , Bin Wu , Juan Jiang , Dongzhi Fu , Ming Gao , Hao Zheng
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Yulin Chen Fengqi Song Xiangang Wan Baigeng Wang Xuefeng Wang Guanghou Wang
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classification cond-mat.mes-hall
keywords diracpdte2typeberryconelayerednontrivialphase
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Here we report the evidence of the type II Dirac Fermion in the layered crystal PdTe2. The de Haas-van Alphen oscillations find a small Fermi pocket with a cross section of 0.077nm-2 with a nontrivial Berry phase. First-principal calculations reveal that it is originated from the hole pocket of a tilted Dirac cone. Angle Resolved Photoemission Spectroscopy demonstrates a type II Dirac cone featured dispersion. We also suggest PdTe2 is an improved platform to host the topological superconductors.

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