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Electronic structure of a weak topological insulator RhBi<sub>2</sub>

ORAL

Abstract

We report a study of electronic structure of triclinic RhBi2 using laser based angle resolved photoemission spectroscopy (ARPES), DFT calculations, and effective model. We observe two surface Dirac points demonstrating that RhBi2 displays topological surface states (TSS) arising from WTI phase at (100) surface. Our results reveal TSS with saddle points that are located in the vicinity of a Dirac point resulting in a van Hove singularity close to the Fermi energy. Due to the combination of exotic features, this material offers great potential as a material platform for novel quantum effects.

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Presenters

  • Kyungchan Lee

    Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Ames Laboratory/Iowa State University

Authors

  • Kyungchan Lee

    Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Ames Laboratory/Iowa State University

  • Gunnar F Lange

    TCM Group, Cavendish Laboratory, University of Cambridge

  • Lin-Lin Wang

    Ames Laboratory, Ames Laboratory/Iowa State University, Department of Physics and Astronomy, Ames Laboratory, Iowa State University, Department of Physics and Astronomy, Iowa State University/Ames Laboratory

  • Brinda Kuthanazhi

    Department of Physics and Astronomy, Ames Laboratory, Iowa State University, Ames Laboratory, Iowa State University, Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Department of Physics & Astronomy, Iowa State University/Ames Laboratory, Ames Laboratory/Iowa State University

  • Thais Victa Trevisan

    Ames Lab, Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Ames Laboratory, Iowa State University

  • Na Hyun Jo

    Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Department of Physics & Astronomy, Iowa State University/Ames Laboratory, Ames Laboratory/Iowa State University

  • Benjamin Schrunk

    Department of Physics and Astronomy, Iowa State University/Ames Laboratory

  • Peter Orth

    Department of Physics and Astronomy, Ames Laboratory, Iowa State University, Iowa State University, Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Ames Laboratory, Iowa State University

  • Robert-Jan Slager

    University of Cambridge, TCM Group, Cavendish Laboratory, University of Cambridge, TCM Group, Cavendish Laboratory/ Department of Physics, University of Cambridge/ Harvard University, Harvard University

  • Paul C Canfield

    Iowa State University/ Ames Laboratory, Ames Laboratory, Ames Laboratory, Iowa State University, Iowa State University, Ames Lab/Iowa State, Ames Laboratory, Ames, IA, Iowa State University/AmesLab, Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Department of Physics & Astronomy, Iowa State University/Ames Laboratory, Ames Laboratory, U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University, Ames Laboratory/Iowa State University

  • Adam Kaminski

    Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Ames Laboratory/Iowa State University