Observation of multiple Dirac states in EuMg<sub>2</sub>Bi<sub>2</sub>

POSTER

Abstract

Initiated by the discovery of topological insulators, topologically non-trivial materials especially topological semimetals and metals have emerged as a new frontier in the field of quantum materials. In this work, we perform a systematic measurement of EuMg2Bi2, a compound with antiferromagnetic transition temperature at 7K. By utilizing angle-resolved photoemission spectroscopy in concurrence with first principle calculation, we observe Dirac cones at the corner and the zone center of the Brillouin zone. From our experimental data odd number of Dirac states are observed per Brillouin zone. Our experimental investigation of detailed electronic structure of EuMg2Bi2 could potentially provide the platform to study the interplay between topology and magnetism.

*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

  • Firoza Kabir

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

Authors

  • Firoza Kabir

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

  • Fairoja Cheenicode-kabeer

    • Department of Physics and Astronomy, Uppsala University

  • Alex Aperis

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

  • 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

  • Christopher Sims

    • University of Central Florida

  • Sabin Regmi

    • University of Central Florida

  • Tomasz Durakiewicz

    • National Science Foundation
    • Los Alamos National Laboratory

  • 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

  • Madhab Neupane

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