Journal
PHYSICAL REVIEW B
Volume 96, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.96.041201
Keywords
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Funding
- National Key Projects for Basic Research of China [2013CB922103, 2017YFA0303200]
- National Natural Science Foundation of China [91622115, 91421109, 61176088, 11522432, 11274003]
- Natural Science Foundation of Jiangsu Province [BK20130054, BK20160659]
- Fundamental Research Funds for the Central Universities
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-76SF00515]
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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 0.077 nm(-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.
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