Stable Weyl points, trivial surface states, and particle-hole compensation in WP2
Razzoli E, Zwartsenberg B, Michiardi M, Boschini F, Day RP, Elfimov IS, Denlinger JD, Suess V, Felser C, Damascelli A (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 97
Article Number: 201103
Journal Issue: 20
DOI: 10.1103/PhysRevB.97.201103
Abstract
A possible connection between extremely large magnetoresistance and the presence of Weyl points has garnered much attention in the study of topological semimetals. Exploration of these concepts in transition-metal diphosphides WP2 has been complicated by conflicting experimental reports. Here we combine angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT) calculations to disentangle surface and bulk contributions to the ARPES intensity, the superposition of which has plagued the determination of the band structure in WP2. Our results show that while the hole- and electronlike Fermi surface sheets originating from surface states have different areas, the bulk-band structure of WP2 is electron-hole compensated in agreement with DFT. Furthermore, the ARPES band structure is compatible with the presence of at least four temperature-independent Weyl points, confirming the topological nature of WP2 and its stability against lattice distortions.
Involved external institutions
University of British Columbia
Canada (CA)
Lawrence Berkeley National Laboratory (LBNL)
United States (USA) (US)
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
Canada (CA)
Lawrence Berkeley National Laboratory (LBNL)
United States (USA) (US)
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
How to cite
APA:
Razzoli, E., Zwartsenberg, B., Michiardi, M., Boschini, F., Day, R.P., Elfimov, I.S.,... Damascelli, A. (2018). Stable Weyl points, trivial surface states, and particle-hole compensation in WP2. Physical Review B, 97(20). https://doi.org/10.1103/PhysRevB.97.201103
MLA:
Razzoli, E., et al. "Stable Weyl points, trivial surface states, and particle-hole compensation in WP2." Physical Review B 97.20 (2018).
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