期刊
PHYSICAL REVIEW LETTERS
卷 120, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.156401
关键词
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资金
- Leverhulme Trust
- Engineering and Physical Sciences Research Council, UK [EP/M023427/1, EP/I031014/1]
- Royal Society
- CREST, JST [JPMJCR16F1, JPMJCR16F2]
- Japan Society for Promotion of Science [24224009, 16H03847]
- International Max-Planck Partnership for Measurement and Observation at the Quantum Limit
- TRF
- SUT [BRG5880010]
- EPSRC [EP/K503162/1, EP/G03673X/1, EP/L505079/1, EP/L015110/1]
- IMPRS for the Chemistry and Physics of Quantum Materials
- EPSRC [EP/M023427/1, EP/I031014/1] Funding Source: UKRI
- Grants-in-Aid for Scientific Research [16H03847] Funding Source: KAKEN
We study the low-energy surface electronic structure of the transition-metal dichalcogenide superconductor PdTe2 by spin-and angle-resolved photoemission, scanning tunneling microscopy, and density-functional theory-based supercell calculations. Comparing PdTe2 with its sister compound PtSe2, we demonstrate how enhanced interlayer hopping in the Te-based material drives a band inversion within the antibonding p-orbital manifold well above the Fermi level. We show how this mediates spin-polarized topological surface states which form rich multivalley Fermi surfaces with complex spin textures. Scanning tunneling spectroscopy reveals type-II superconductivity at the surface, and moreover shows no evidence for an unconventional component of its superconducting order parameter, despite the presence of topological surface states.
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