Observation of Surface States in Concentric Nodal Line Semimetal Candidate ZrP2

ORAL

Abstract

Topological semimetals have enhanced our understanding of topological states in condensed matter physics. In topological nodal line semimetals, conduction and valence bands cross each other along a closed curve in the three-dimensional Brillouin zone, where no perturbation can remove this crossing line and open a full direct gap between the two bands. These nodal lines are topologically protected by the symmetry group and can be associated with a topological invariant. Here, we present a systematic angle-resolved photoemission spectroscopy study of a topological nodal-line semi metallic state in the transition metal dipnictide ZrP2. Our study reveals the detailed electronic structure of ZrP2, which is protected by non symmorphic symmetry, more specifically the glide symmetry. Our findings reveal that that ZrP2 contains concentric intersecting coplanar ellipse (CICE) nodal lines.

*This work is supported by U.S. AFOSR Grant No. FA9550-17-1-0415 and NSF CAREER Grant No. DMR-1847962.

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Presenters

  • Christopher Sims

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

Authors

  • Christopher Sims

    • 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

  • Firoza Kabir

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

  • Hugo Aramberri

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

  • Cheng-Yi Huang

    • Department of Physics, Northeastern University
    • Physics, Northeastern University
    • Physics, California State University, Northridge

  • Gyanendra Dhakal

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

  • Klauss Dimitri

    • 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

  • Xiaoting Zhou

    • Physics, California State University, Northridge

  • Tay-Rong Chang

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

  • Hsin Lin

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

  • Dariusz Kaczorowski

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

  • Nicholas Kioussis

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

  • Madhab Neupane

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