Anomalous electronic structure and magnetoresistance in TaAs2
Open accessAbstract
The change in resistance of a material in a magnetic field reflects its electronic state. In metals with weakly- or non-interacting electrons, the resistance typically increases upon the application of a magnetic field. In contrast, negative magnetoresistance may appear under some circumstances, e.g., in metals with anisotropic Fermi surfaces or with spin-disorder scattering and semimetals with Dirac or Weyl electronic structures. Here we show that the non-magnetic semimetal TaAs 2 possesses a very large negative magnetoresistance, with an unknown scattering mechanism. Density functional calculations find that TaAs 2 is a new topological semimetal [ℤ 2 invariant (0;111)] without Dirac dispersion, demonstrating that a negative magnetoresistance in non-magnetic semimetals cannot be attributed uniquely to the Adler-Bell-Jackiw chiral anomaly of bulk Dirac/Weyl fermions.
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Strong negative longitudinal magnetoresistance has been inferred for non-WSM non-DSM systems such as TaAs2 and NbAs2.
“Strong negative longitudinal MR has also been inferred recently for non-WSM non-DSM systems like TaAs 2 and NbAs 2 (Luo et al. , 2016; Yuan et al. , 2016b).”
From Weyl and Dirac semimetals in three-dimensional solids (2018) · cites this paper as Luo et al., 2016
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Cited by
Sorted by citations
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
“Strong negative longitudinal MR has also been inferred recently for non-WSM non-DSM systems like TaAs2 and NbAs2 (Luo et al., 2016; Yuan et al., 2016b).”
BackgroundOn the search for the chiral anomaly in Weyl semimetals: the negative longitudinal magnetoresistance
Reis, R. D. D., Ajeesh, M. O., Kumar, N., Arnold, F., Shekhar, C., Naumann, M., Schmidt, M., Nicklas, M., & Hassinger, E. (2016) · New Journal of Physics · doi:10.1088/1367-2630/18/8/085006 · Cited by 181 · see citing works
Weyl and Dirac Semimetals in Three Dimensional Solids
Armitage, N. P., Mele, E. J., & Vishwanath, A. (2017) · arXiv
“Strong negative longitudinal MR has also been inferred recently for non-WSM non-DSM systems like TaAs2 and NbAs2 (Luo et al., 2016; Yuan et al., 2016b).”
Background
- Authors
- Luo, Y., McDonald, R. D., Rosa, P. F. S., Scott, B., Wakeham, N., Ghimire, N. J., Bauer, E. D., Thompson, J. D., & Ronning, F.
- Affiliations
- Los Alamos National Laboratory (US)
- Corresponding author
- Luo, Yongkang
- Thompson, J. D.
- Ronning, F.
- Venue
- Scientific Reports
- Published
- 2016-06-07
- Volume
- 6
- Issue
- 1
- Pages
- 27294-27294
- ISSN
- 2045-2322 (ISSN-L)
- PMC
- PMC4895157
- OpenAlex
- W2413296144
- Cited by
- 91
- References
- 3
- Citations by year
- 2026: 1 · 2025: 5 · 2024: 4 · 2023: 7 · 2022: 5 · 2021: 10 · 2020: 8 · 2019: 14 · 2018: 16 · 2017: 17 · 2016: 4
- FWCI
- 8.04
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Scientific Reports (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
- arXiv (Cornell University)
- Funders
- National Science Foundation (1157490)
- U.S. Department of Energy (DMR-1157490)
- National High Magnetic Field Laboratory (DMR-1157490, 1157490)
- Division of Materials Research (11‐57490, DMR 1157490)
- Basic Energy Sciences
- Laboratory Directed Research and Development
- Los Alamos National Laboratory
- State of Florida
- 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
- negative magnetoresistance, topological semimetals, Z2 topological invariant, chiral anomaly, spin-disorder scattering, Fermi surface anisotropy, electron scattering mechanisms
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