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Observation of spin-polarized surface states in a nodal line semimetal SnTaS$_{2}$
- Source :
- Phys. Rev. B 107, 045142 (2023)
- Publication Year :
- 2023
-
Abstract
- The superconductor SnTaS$_{2}$ is theoretically predicted to be an intriguing topological nodal line semimetal without consideration of spin-orbit coupling. By carrying out angle-resolved photoemission (ARPES) and spin-resolved ARPES measurements combined with band structure calculations, we have provided a complete picture of the electronic structure and spin polarization property for the prominent surface states of SnTaS$_{2}$. The low-energy electronic states are dominated by surface states; two of them are from the S-terminated surface, while four of them are from the Sn-terminated surface. These give rise to interesting Fermi surface topology of SnTaS$_{2}$: three pockets located at $\bar\Gamma$, $\bar{M}$ and $\bar{K}$ for the S-terminated surface and two pockets surrounding $\bar\Gamma$ and $\bar{K}$ for the Sn-terminated surface. We further reveal that two surface states that cross the Fermi level are spin-polarized. Since SnTaS$_{2}$ is also a superconductor, our observations indicate that it may provide a new platform to explore topological superconductivity and other exotic properties.
- Subjects :
- Condensed Matter - Superconductivity
Condensed Matter - Materials Science
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 107, 045142 (2023)
- Publication Type :
- Report
- Accession number :
- edsarx.2303.11178
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.107.045142