1. Nontrivial Berry phase and type-II Dirac transport in the layered material PdTe2.
- Author
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Fucong Fei, Xiangyan Bo, Rui Wang, Bin Wu, Juan Jiang, Dongzhi Fu, Ming Gao, Hao Zheng, Yulin Chen, Xuefeng Wang, Haijun Bu, Fengqi Song, Xiangang Wan, Baigeng Wang, and Guanghou Wang
- Subjects
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PALLADIUM compounds , *FERMIONS , *GEOMETRIC quantum phases - Abstract
We report on a systematic study of type-II Dirac fermions in a layered crystal of PdTe2. De Haas-van Alphen oscillations show a small Fermi-surface pocket with a cross section of 0.077nm-2 with a nontrivial Berry phase. First-principles calculation reveals that the nontrivial Berry phase originates from a hole pocket formed by the tilted Dirac cone. In addition, the band dispersion measured with angle-resolved photoemission spectroscopy is found to be consistent with that of a type-II Dirac cone dispersion. We propose that PdTe2 is an improved platform to host topological superconductors. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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