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

DOI: 10.1103/PhysRevX.6.031021 DOI Help

Authors: A. Tamai (University of Geneva) , Q. S. Wu (Theoretical Physics and Station Q Zurich, ETH Zurich) , I. Cucchi (University of Geneva) , F. Y. Bruno (University of Geneva) , S. Riccò (University of Geneva) , T. K. Kim (Diamond Light Source) , M. Hoesch (Diamond Light Source) , C. Barreteau (University of Geneva) , E. Giannini (University of Geneva) , C. Besnard (University of Geneva) , A. A. Soluyanov (St. Petersburg State University, ETH Zurich) , F. Baumberger (University of Geneva)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review X , VOL 6 , PAGES 031021

State: Published (Approved)
Published: August 2016
Diamond Proposal Number(s): 12404

Open Access Open Access

Abstract: 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.

Subject Areas: Physics, Materials

Instruments: I05-ARPES