Observation of Nodal Loops in HfP2

POSTER

Abstract

Topological nodal-line semimetals that arise due to band touching which are protected by crystalline symmetries are materials that are currently being pushed to further understand topology in crystals protected by different symmetries. Here we report the experimental observation of three topological nodal loops in the transition metal pnictide HfP2 using angle resolved photoemission spectroscopy. Our systematic study reveals the detailed electronic structure of HfP2 which is protected by glide symmetry. Our calculations reveal three unique nodal loops, one of which is protected by glide symmetry in the center and two non-trivial topological nodal loops in finite k-space. Our experimental data and calculations both reveal the existence of these non-trivial loops which warrants further symmetry analysis in the non-symmorphic space group.

*This work is supported by the Air Force Office of Scientific Research under Award No. FA9550-17-1-0415 and the startup fund from UCF (M.N.).

Presenters

  • Christopher Sims

    • University of Central Florida
    • Physics, University of Central Florida, Orlando, Florida 32816, USA

Authors

  • Christopher Sims

    • University of Central Florida
    • Physics, University of Central Florida, Orlando, Florida 32816, USA

  • Md Mofazzel Hosen

    • University of Central Florida
    • Physics, University of Central Florida, Orlando, Florida 32816, USA
    • Physics, University of Central Florida

  • Gyanendra Dhakal

    • University of Central Florida
    • Physics, University of Central Florida, Orlando, Florida 32816, USA
    • Physics, University of Central Florida

  • Hugo Aramberri

    • Physics and Astronomy, California State University, Northridge, California 91330, USA
    • Instituto de Ciencia de Materiales de Madrid, ICMM-CSIC

  • Klauss Dimitri

    • University of Central Florida
    • Physics, University of Central Florida, Orlando, Florida 32816, USA
    • Physics, University of Central Florida

  • Firoza Kabir

    • University of Central Florida
    • Physics, University of Central Florida, Orlando, Florida 32816, USA
    • Physics, University of Central Florida

  • 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

  • XIAOTING ZHOU

    • Physics, National Cheng Kung University, Tainan, 701, Taiwan
    • National Cheng Kung University
    • Department of Physics, National Cheng Kung University

  • Tay-Rong Chang

    • National Cheng Kung University
    • Physics, National Cheng Chung University
    • Physics, National Cheng Kung University, Tainan, 701, Taiwan
    • Department of Physics, National Cheng Kung University
    • Physics, National Tsing Hua University
    • Physics, National Cheng Kung University

  • Hsin Lin

    • Academia Sinica
    • Institute of Physics, Academia Sinica
    • Physics, Academia Sinica, Taipei 11529, Taiwan
    • Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
    • Physics, Academia Sinica
    • Department of Physics, National University of Singapore
    • National University of Singapore
    • Academia Sinica, Taipei, Taiwan

  • Nicholas Kioussis

    • Physics and Astronomy, California State University, Northridge, California 91330, USA
    • Physics and Astronomy, California State University, Northridge
    • California State University, Northridge

  • Madhab Neupane

    • University of Central Florida
    • Physics, University of Central Florida, Orlando, Florida 32816, USA
    • Physics, University of Central Florida