Discovery of topological nodal-line fermionic phase in a magnetic material GdSbTe

POSTER

Abstract


Topological semimetals with accidental band touching between conduction and valence bands protected by time-reversal (TR) and inversion symmetry are at the frontier of modern condensed matter research. Mostly, the discovered topological semimetals are non-magnetic and preserve TR symmetry. Here, we report the systematic electronic structure study of the antiferromagnetic GdSbTe using angle-resolved photoemission spectroscopy (ARPES) as well as first-principles calculations. Our study reveals the presence of nodal-line semimetallic state along the Γ-M direction of the Brillouin zone (BZ). Our data also reveal a robust Dirac like state at X point of the BZ both below and above the magnetic transition temperature (TN = 13K). With a relatively high transition temperature, GdSbTe can prove to be an archetypical platform to study the interaction between magnetism and topological states of matter.

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This work is supported by the Air Force Office of Scientific Research under Award No. FA9550-17-1-0415 and the startup fund from UCF (M.N.)

Presenters

  • Sabin Regmi

    • University of Central Florida

Authors

  • Sabin Regmi

    • University of Central Florida

  • Md Mofazzel Hosen

    • University of Central Florida
    • Physics, University of Central Florida, Orlando, Florida 32816, USA
    • Physics, University of Central Florida

  • Gyanendra Dhakal

    • University of Central Florida
    • Physics, University of Central Florida, Orlando, Florida 32816, USA
    • Physics, University of Central Florida

  • Klauss Dimitri

    • University of Central Florida
    • Physics, University of Central Florida, Orlando, Florida 32816, USA
    • Physics, University of Central Florida

  • Pablo Maldonado

    • Uppsala University

  • Alex Aperis

    • Uppsala University
    • Department of Physics and Astronomy, Uppsala University

  • Firoza Kabir

    • University of Central Florida
    • Physics, University of Central Florida, Orlando, Florida 32816, USA
    • Physics, University of Central Florida

  • Christopher Sims

    • University of Central Florida
    • Physics, University of Central Florida, Orlando, Florida 32816, USA

  • Peter Riseborough

    • Temple University

  • Peter Oppeneer

    • Uppsala University
    • Department of Physics and Astronomy, Uppsala University

  • Dariusz Kaczorowski

    • Polish Academy of Sciences
    • Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-950 Wroclaw, Poland
    • Institute of Low Temperature and Structure Research, Polish Academy of Sciences
    • Polish Academy of Science

  • Tomasz Durakiewicz

    • National Science Foundation
    • Los Alamos National Laboratory

  • Madhab Neupane

    • University of Central Florida
    • Physics, University of Central Florida, Orlando, Florida 32816, USA
    • Physics, University of Central Florida