Topological states in A15 superconductors
Abstract
Superconductors with the A15 structure are prototypical type-II s-wave superconductors which have generated considerable interest in early superconducting material history. Yet, the topological nature of the electronic structure remains unnoticed so far. In this work, using first-principles band structure calculations based on density-functional theory, we show that the A15 superconductors (Ta3Sb, Ta3Sn, and Ta3Pb) have nontrivial band topology in the bulk electronic band structures, leading to the formation of topological surface states near the Fermi energy. Due to the bulk superconductivity, the proximity effect in the topological surface states would induce topological superconductivity even without heterostructure of a topological insulator and an s-wave superconductor. Our results indicate that the A15 superconductors are promising candidates for the realization of the topological superconductivity and the Majorana fermion.
- Authors:
-
- Ames Lab. and Iowa State Univ., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1542878
- Alternate Identifier(s):
- OSTI ID: 1546236
- Report Number(s):
- IS-J-9967
Journal ID: ISSN 2469-9950; PRBMDO
- Grant/Contract Number:
- AC02-07CH11358; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 99; Journal Issue: 22; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Kim, Minsung, Wang, Cai-Zhuang, and Ho, Kai-Ming. Topological states in A15 superconductors. United States: N. p., 2019.
Web. doi:10.1103/PhysRevB.99.224506.
Kim, Minsung, Wang, Cai-Zhuang, & Ho, Kai-Ming. Topological states in A15 superconductors. United States. https://doi.org/10.1103/PhysRevB.99.224506
Kim, Minsung, Wang, Cai-Zhuang, and Ho, Kai-Ming. Wed .
"Topological states in A15 superconductors". United States. https://doi.org/10.1103/PhysRevB.99.224506. https://www.osti.gov/servlets/purl/1542878.
@article{osti_1542878,
title = {Topological states in A15 superconductors},
author = {Kim, Minsung and Wang, Cai-Zhuang and Ho, Kai-Ming},
abstractNote = {Superconductors with the A15 structure are prototypical type-II s-wave superconductors which have generated considerable interest in early superconducting material history. Yet, the topological nature of the electronic structure remains unnoticed so far. In this work, using first-principles band structure calculations based on density-functional theory, we show that the A15 superconductors (Ta3Sb, Ta3Sn, and Ta3Pb) have nontrivial band topology in the bulk electronic band structures, leading to the formation of topological surface states near the Fermi energy. Due to the bulk superconductivity, the proximity effect in the topological surface states would induce topological superconductivity even without heterostructure of a topological insulator and an s-wave superconductor. Our results indicate that the A15 superconductors are promising candidates for the realization of the topological superconductivity and the Majorana fermion.},
doi = {10.1103/PhysRevB.99.224506},
journal = {Physical Review B},
number = 22,
volume = 99,
place = {United States},
year = {Wed Jun 12 00:00:00 EDT 2019},
month = {Wed Jun 12 00:00:00 EDT 2019}
}
Web of Science
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Works referencing / citing this record:
Topological nodal line state in superconducting NaAlSi compound
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