Year: 2020
Type: article
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 crossings between the conduction and valence bands. Additionally, exploring this direction can lead to a deeper understanding on the topological properties of crystals hosting a variety of symmetries. We report the experimental observation of topological surface states in the nodal-loop semimetal ${\mathrm{HfP}}_{2}$ using angle-resolved photoemission spectroscopy which is supported by our first-principles calculations. Our paper shows termination-dependent surface states in this compound. Our experimental data reveal surface states linked to three unique nodal loops confirmed by theoretical calculation to be topologically nontrivial. This paper demonstrates that transition-metal dipnictides provide a good platform to study nontrivial topological states protected by nonsymmorphic symmetry.
Source: Physical Review Materials
Authors: Christopher Sims, M. Mofazzel Hosen, Hugo Aramberri, Cheng-Yi Huang, Gyanendra Dhakal, Klauss Dimitri, Firoza Kabir, Sabin Regmi, Xiaoting Zhou, Tay-Rong Chang, Hsin Lin, Dariusz Kaczorowski, Nicholas Kioussis, Madhab Neupane
Institutions: University of Central Florida, California State University, Northridge, Institute of Physics, Academia Sinica, National Cheng Kung University, National Center for Theoretical Sciences, Physics Division, Włodzimierz Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences
Language: Latvian
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: Investigating the Novel Topological Electronic Structures, Topological Phase Transition, Oxide Physics, Heterostructure, Low Dimensional Materials, and Spectroscopy Simulation( II ), PREM: Partnership between CSUN and Princeton for Quantum Materials, Quantum Computation, Devices and Technologies( I ), Simulation for Interference Patterns in Fourier-Transform Scanning Tunneling Spectroscopy, G42916606, CAREER: Correlated Topological Phases in Rare-earth-based Compounds
OpenAlex ID: W2950202132