Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides
Name
PhysRevX.5.011029.pdf
Size
2.12 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Weng, Hongming
Fang, Chen
Fang, Zhong
Bernevig, B. Andrei
Dai, Xi
Date Issued
March 2015
Journal
Physical Review X
Publisher
American Physical Society
Citation
Weng, Hongming et al. “Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides.” Physical Review X 5.1 (March 2015)
Version
Final published version
Abstract
Based on first-principle calculations, we show that a family of nonmagnetic materials including TaAs, TaP, NbAs, and NbP are Weyl semimetals (WSM) without inversion centers. We find twelve pairs of Weyl points in the whole Brillouin zone (BZ) for each of them. In the absence of spin-orbit coupling (SOC), band inversions in mirror-invariant planes lead to gapless nodal rings in the energy-momentum dispersion. The strong SOC in these materials then opens full gaps in the mirror planes, generating nonzero mirror Chern numbers and Weyl points off the mirror planes. The resulting surface-state Fermi arc structures on both (001) and (100) surfaces are also obtained, and they show interesting shapes, pointing to fascinating playgrounds for future experimental studies.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevX.5.011029
