Fermi Arcs and Their Topological Character in the Candidate Type-II Weyl Semimetal MoTe2

We report a combined experimental and theoretical study of the candidate type-II Weyl semimetal MoTe2 . Using laser-based angle-resolved photoemission, we resolve multiple distinct Fermi arcs on the inequivalent top and bottom (001) surfaces. All surface states observed experimentally are reproduced...

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Bibliographic Details
Published inPhysical review. X Vol. 6; no. 3
Main Authors Tamai, A, Wu, Q S, Cucchi, I, Bruno, F Y, Riccò, S, Kim, T K, Hoesch, M, Barreteau, C, Giannini, E, Besnard, C, Soluyanov, A A, Baumberger, F
Format Journal Article
LanguageEnglish
Published College Park American Physical Society 2016
Subjects
Chirality
Crystal structure
Electronic structure
Elementary excitations
Fermions
Laser applications
Molybdenum compounds
Nuclei (nuclear physics)
Particle physics
Photoelectric emission
Relativity
Standard model (particle physics)
Tellurides
Topology
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Summary:We report a combined experimental and theoretical study of the candidate type-II Weyl semimetal MoTe2 . Using laser-based angle-resolved photoemission, we resolve multiple distinct Fermi arcs on the inequivalent top and bottom (001) surfaces. All surface states observed experimentally are reproduced by an electronic structure calculation for the experimental crystal structure that predicts a topological Weyl semimetal state with eight type-II Weyl points. We further use systematic electronic structure calculations simulating different Weyl point arrangements to discuss the robustness of the identified Weyl semimetal state and the topological character of Fermi arcs in MoTe2 .
ISSN:2160-3308
DOI:10.1103/PhysRevX.6.031021