Topological surface electronic states in candidate nodal-line semimetal CaAgAs
Name
PhysRevB.96.161112.pdf
Size
1.48 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Wang, Xiao-Bo
Ma, Xiao-Ming
Emmanouilidou, Eve
Shen, Bing
Hsu, Chia-Hsiu
Zhou, Chun-Sheng
Zuo, Yi
Song, Rong-Rong
Wang, Gan
Huang, Li
Date Issued
October 2017
Journal
Physical Review B
Publisher
American Physical Society
Citation
Wang, Xiao-Bo et al. "Topological surface electronic states in candidate nodal-line semimetal CaAgAs." Physical Review B 96, 16 (October 2017): 161112(R) © 2017 American Physical Society
Version
Final published version
Abstract
We investigate systematically the bulk and surface electronic structure of the candidate nodal-line semimetal CaAgAs by angle-resolved photoemission spectroscopy and density functional calculations. We observed a metallic, linear, non-k[subscript z]-dispersive surface band that coincides with the high-binding-energy part of the theoretical topological surface state, proving the topological nontriviality of the system. An overall downshift of the experimental Fermi level points to a rigid-band-like p doping of the samples, due possibly to Ag vacancies in the as-grown crystals.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.96.161112
