APS Logo

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.

–

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