Termination Dependent Topological Surface States in Nodal Loop Semimetal HfP2

ORAL

Abstract

Symmetry plays a major role in all disciplines of physics. Within the field of topological materials
there is a great interest in understanding how the mechanics of crystalline and internal symmetries protect nodal line type features in respect to spin orbit coupling. Additionally, The surface environment of a material can severely impact the surface states that are probed by angle resolved photoemission spectroscopy (ARPES). For the first time, we report the experimental observation of topological surface states in the nodal loop semimetal HfP2 using ARPES which is supported by our first principles calculations. Our study shows termination dependent surface states in this compound which are linked to three unique nodal loops that are confirmed to be topologically non-trivial. This work demonstrates that transition metal dipnictides provide a good platform to study non-trivial topological states protected by nonsymmorphic symmetry.

*This project is supported by the Air Force Office of Scientific Research under award number FA9550-17-1-0415 and the National Science Foundation (NSF) CAREER award DMR-1847962.

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Presenters

  • Christopher Sims

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

Authors

  • Christopher Sims

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

  • M. Mofazzel Hosen

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

  • Hugo Aramberri

    • Luxembourg Inst of Science and Technology
    • Physics and Astronomy, California State University, Northridge
    • Department of Physics and Astronomy, California State University, Northridge

  • Cheng-Yi Huang

    • Academia Sinica
    • Physics and Astronomy, California State University, Northridge
    • Institute of Physics, Academia Sinica, Taipei, Taiwan

  • Gyanendra Dhakal

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

  • Klauss Dimitri

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

  • Firoza Kabir

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

  • Sabin Regmi

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

  • XIAOTING ZHOU

    • National Cheng Kung University
    • Physics and Astronomy, California State University, Northridge
    • Department of Physics and Astronomy, California State University, Northridge

  • Tay-Rong Chang

    • National Cheng Kung University
    • Physics, National Cheng Kung University
    • Department of Physics, National Cheng Kung University
    • National Cheng Kung University, Taiwan

  • Hsin Lin

    • Academia Sinica
    • Physics, Academia Sinica
    • Institute of Physics, Academia Sinica, Taipei, Taiwan
    • Institute of Physics, Academia Sinica

  • Dariusz Kaczorowski

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

  • Nicholas Kioussis

    • California State University, Northridge
    • Physics and Astronomy, California State University, Northridge
    • Department of Physics and Astronomy, California State University, Northridge

  • Madhab Neupane

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