Observation of multiple Dirac states in EuMg2Bi2

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.

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