Observation of a topological drumhead surface state in a topological semimetal

ORAL

Abstract

Topological non-trivial states of matter manifest unique electronic structures, including 3D Dirac line nodes and topological surface states. One notable topological surface states, drumhead surface states, have received significant attention because of its unique flat dispersion. Despite a large number of works, such a flat signature of drumhead states remains elusive. We will present the experimental evidence of nearly-flat drumhead surface states in a topological semimetal BaAl4 using angle-resolved photoemission spectroscopy and discuss these results in terms of correlations.

*The work was supported by the Quantum Materials Program at LBNL, funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, under Contract No. DE-AC02-05-CH11231.

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Presenters

  • Ryo Mori

    • Lawrence Berkeley National Laboratory

Authors

  • Ryo Mori

    • Lawrence Berkeley National Laboratory

  • Kefeng Wang

    • University of Maryland, College Park
    • Brookhaven National Laboratory

  • Takahiro Morimoto

    • University of Tokyo
    • Department of Applied Physics, The University of Tokyo
    • The University of Tokyo
    • Univ of Tokyo

  • Jonathan Denlinger

    • Materials Sciences Division, Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Laboratory
    • Advanced Light Source
    • Advanced Light Source, LBNL
    • Advanced light source
    • Advanced Light Source, Lawrence Berkeley National Lab

  • Johnpierre Paglione

    • University of Maryland, College Park
    • Maryland Quantum Materials Center, Department of Physics, University of Maryland
    • Quantum Materials Center, Department of Physics, University of Maryland College Park
    • Quantum Materials Center, University of Maryland, College Park
    • Maryland Quantum Materials Center and Department of Physics, University of Maryland, College Park
    • University of Maryland

  • Alessandra Lanzara

    • University of California, Berkeley
    • Department of Physics, University of California
    • Physics, University of California, Berkeley
    • Lawrence Berkeley National Laboratory
    • Department of Physics, University of California Berkeley
    • Physics, University of California Berkeley
    • Physics, UC Berkeley