Direct observation of nonequivalent Fermi-arc states of opposite surfaces in the noncentrosymmetric Weyl semimetal NbP
Open accessAbstract
Weyl semimetals (WSMs) provide a platform to realize long-sought massless Weyl fermions, which can host a variety of exotic quantum phenomena such as chiral anomalies and anomalous Hall conductivity. The most intriguing nature of WSMs is the emergence of an unconventional surface state called a Fermi arc, which is distinct from the well-known Fermi surface of ordinary metals. The authors have used angle-resolved photoemission spectroscopy on NbP and succeeded in observing the electronic states for two differently terminated surfaces of this noncentrosymmetric crystal. Corroborated by first-principles calculations, it is unambiguously demonstrated that NbP is a Weyl semimetal with reduced spin-orbit coupling, exhibiting a drastic difference in the Fermi-surface topology between the P- and Nb-terminated surfaces. Through a direct comparison of Fermi-arc surface states between the two surfaces, the momentum location of Weyl nodes has been elucidated. The present results provides a pathway for exploring new quantum phenomena utilizing Fermi-arc properties of WSMs.
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The inherent inversion symmetry breaking of the TaAs material class reveals itself in an asymmetry in the photoemission spectra of the top and bottom surfaces.
“The inherent inversion symmetry breaking of the TaAs material class reveals itself in an asymmetry in the photoemission spectra of the top and bottom surfaces as the spectra from the (001) direction is different than the (001) direction (Souma et al. , 2016; Sun et al. , 2015b).”
From Weyl and Dirac semimetals in three-dimensional solids (2018) · cites this paper as Souma et al. , 2016
Cites
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Experimental Discovery of Weyl Semimetal TaAs
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A Weyl Fermion semimetal with surface Fermi arcs in the transition metal monopnictide TaAs class
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Weyl and Dirac semimetals in three-dimensional solids
Armitage, N. P., Mele, E. J., & Vishwanath, A. (2018) · Reviews of Modern Physics · doi:10.1103/revmodphys.90.015001 · Cited by 4,528 · see citing works
“The inherent inversion symmetry breaking of the TaAs material class reveals itself in an asymmetry in the photoemission spectra of the top and bottom surfaces as the spectra from the (001) direction is different than the (001) direction (Souma et al., 2016; Sun et al., 2015b).”
BackgroundTransport of Topological Semimetals
Hu, J., Xu, S.-Y., Ni, N., & Mao, Z. (2019) · Annual Review of Materials Research · doi:10.1146/annurev-matsci-070218-010023 · Cited by 265 · see citing works
Xu, Q., Liu, E., Shi, W., Muechler, L., Gayles, J., Felser, C., & Sun, Y. (2018) · Physical Review B · doi:10.1103/physrevb.97.235416 · Cited by 221 · see citing works
Gao, W., Hao, N., Zheng, F.-W., Ning, W., Wu, M., Zhu, X., Zheng, G., Zhang, J., Lu, J., Zhang, H., et al. (2017) · Physical Review Letters · doi:10.1103/physrevlett.118.256601 · Cited by 142 · see citing works
Weyl and Dirac Semimetals in Three Dimensional Solids
Armitage, N. P., Mele, E. J., & Vishwanath, A. (2017) · arXiv
“The inherent inversion symmetry breaking of the TaAs material class reveals itself in an asymmetry in the photoemission spectra of the top and bottom surfaces as the spectra from the (001) direction is different than the (001) direction (Souma et al., 2016; Sun et al., 2015b).”
Background
- Authors
- Souma, S., Wang, Z., Kotaka, H., Sato, T., Nakayama, K., Tanaka, Y., Kimizuka, H., Takahashi, T., Yamauchi, K., Oguchi, T., Segawa, K., & Ando, Y.
- Affiliations
- Tohoku University (JP)
- The Institute of Scientific and Industrial Research, The University of Osaka (JP)
- Kyoto Sangyo University (JP)
- University of Cologne (DE)
- ORCID
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 2016-04-20
- Volume
- 93
- Issue
- 16
- ISSN
- 2469-9950 (ISSN-L)
- 2469-9969
- OpenAlex
- W2265413891
- Cited by
- 117
- References
- 7
- Citations by year
- 2026: 5 · 2025: 9 · 2024: 7 · 2023: 4 · 2022: 11 · 2021: 9 · 2020: 8 · 2019: 17 · 2018: 24 · 2017: 16 · 2016: 5 · 2015: 2
- FWCI
- 9.78
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical review. B./Physical review. B (publishedVersion)
- Kölner Universitäts PublikationsServer (Universität zu Köln) (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- Funders
- Ministry of Education, Culture, Sports, Science, and Technology (15H05853)
- Japan Society for the Promotion of Science (15H02105, 26287071, 25287079, 23.4376)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Topological Materials and Phenomena
- Physical Sciences › Materials Science › Materials Chemistry › 2D Materials and Applications
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Advanced Condensed Matter Physics
- Keywords
- Weyl semimetals, NbP, Fermi arcs, Weyl points, noncentrosymmetric crystals, surface states, spin-orbit coupling, Fermi surface topology, Weyl fermions
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