Observation of multi-fermionic states in Ti<sub>2</sub>Te<sub>2</sub>P

ORAL

Abstract

The advent of topological insulators (TIs) in a three-dimensional system followed by topological semimetallic states (TSMs) brought a paradigm shift in the understanding of the materials. Here we report the observation of the surface Dirac dispersion in a material Ti2Te2P at the M point of the Brillouin zone (BZ) in a tetradymite crystal structure employing angle-resolved photoemission spectroscopy (ARPES), which is in agreement with the first-principles calculations. Our study further reveals a Dirac cone dispersion at the Gamma-point of the BZ suggesting that this material holds multi-fermionic states. Our systematic studies open a platform to study the exotic properties of Dirac state in a single material.

*This work is supported by the Air Force Office of Scientific Research under Award No. FA9550-17-1-0415 and the National Science Foundation (NSF) CAREER Award No. DMR-1847962.

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Presenters

  • Gyanendra Dhakal

    • University of Central Florida
    • Physics, University of Central Florida
    • Department of Physics, University of Central Florida

Authors

  • Gyanendra Dhakal

    • University of Central Florida
    • Physics, University of Central Florida
    • Department of Physics, University of Central Florida

  • Md Mofazzel Hosen

    • University of Central Florida
    • Physics, Boston College
    • Physics, University of Central Florida
    • Department of Physics, University of Central Florida

  • Ashis K, Nandy

    • Department of Physics and Astronomy, Uppsala University

  • Alexandros Aperis

    • Department of Physics and Astronomy, Uppsala University

  • Klauss Dimitri

    • University of Central Florida
    • Physics, University of Central Florida
    • Department of Physics, University of Central Florida

  • Pablo Maldonado

    • Department of Physics and Astronomy, Uppsala University

  • Christopher Sims

    • University of Central Florida
    • Physics, University of Central Florida
    • Department of Physics, University of Central Florida

  • Firoza Kabir

    • University of Central Florida
    • Physics, University of Central Florida
    • Department of Physics, University of Central Florida

  • Sabin Regmi

    • University of Central Florida
    • Physics, University of Central Florida
    • Department of Physics, University of Central Florida

  • Yangyang Liu

    • Physics, University of Central Florida
    • University of Central Florida
    • Department of Physics, University of Central Florida

  • Luis Persaud

    • Physics, University of Central Florida
    • University of Central Florida

  • Dariusz Kaczorowski

    • Institute of Low Temperature and Structure Research, Polish Academy of Sciences
    • Institute of Low Temperature and Structure Research
    • Polish Academy of Science

  • Peter Oppeneer

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

  • Madhab Neupane

    • University of Central Florida
    • Physics, University of Central Florida
    • Univ of Central Florida
    • Department of Physics, University of Central Florida