Electronic Structures of type-I Dirac semimetal BaAl<sub>4</sub>

ORAL

Abstract

Topological non-trivial quantum states, such as topological insulators and Dirac/Wyle semimetals, have been attracting the community because of their rich novel physical properties and the wide range of possibilities of applications. Recently, BaAl4 has been proposed as a Dirac semimetal with type-I Dirac point protected by the symmetry of C4v with extremely large magnetoresistance. We will report a study of the electronic structure of this material from angle-resolved photoemission spectroscopy (ARPES) measurements, with focus on both the surface and bulk states. The semimetal nature of these states will be discussed.

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Presenters

  • Ryo Mori

    • University of California, Berkeley and Lawrence Berkeley National Laboratory

Authors

  • Ryo Mori

    • University of California, Berkeley and Lawrence Berkeley National Laboratory

  • Kefeng Wang

    • University of Maryland, College Park
    • CNAM, Physics Department, University of Maryland
    • Univ of Maryland-College Park

  • Jonathan Ma

    • University of California, Berkeley and Lawrence Berkeley National Laboratory

  • Jonathan Denlinger

    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Lawrence Berkeley Natl Lab
    • Lawrence Berkeley National Laboratory

  • Johnpierre Paglione

    • Center for Nanophysics and Advanced Materials , University of Maryland
    • CNAM, Department of Physics, University of Maryland
    • Univ of Maryland-College Park
    • Department of Physics, University of Maryland
    • CNAM, Department of Physics, Univ of Maryland-College Park
    • Univ of Maryland - College Park
    • College Park, MD 20742-4111, Univ of Maryland-College Park
    • Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland
    • Center for Nanophysics and Advanced Materials, University of Maryland
    • University of Maryland, College Park
    • University of Maryland

  • Alessandra Lanzara

    • University of California Berkeley
    • University of California
    • Univ of California - Berkeley
    • Physics Department - University California, Berkeley, Materials Sciences Division - Lawrence Berkeley National Laboratory
    • Materials Sciences Division, Lawrence Berkeley National Laboratory
    • University of California, Berkeley and Lawrence Berkeley National Laboratory
    • Department of Physics, Univ of California - Berkeley
    • Univ. of California - Berkeley