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Title: Low-energy surface states in the normal state of α - PdBi 2 superconductor

Topological superconductors as characterized by Majorana surface states have been actively searched for their significance in fundamental science and technological implication. The large spin-orbit coupling in Bi-Pd binaries has stimulated extensive investigations on the topological surface states in these superconducting compounds. Here we report a study of normal-state electronic structure in a centrosymmetric α-PdBi 2 within density functional theory calculations. By investigating the electronic structure from the bulk to slab geometries in this system, we predict for the first time that α-PdBi 2 can host orbital-dependent and asymmetric Rashba surface states near the Fermi energy. This study suggests that α-PdBi 2 will be a good candidate to explore the relationship between superconductivity and topology in condensed matter physics.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Central Florida, Orlando, FL (United States)
  3. Tokyo Inst. of Technology (Japan)
  4. Nanyang Technological Univ. (Singapore)
Publication Date:
Report Number(s):
LA-UR-17-22900
Journal ID: ISSN 2475-9953; PRMHAR; TRN: US1703258
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 1; Journal Issue: 3; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Material Science
OSTI Identifier:
1406216
Alternate Identifier(s):
OSTI ID: 1376943

Choi, Hongchul, Neupane, Madhab, Sasagawa, T., Chia, Elbert E. M., and Zhu, Jian-Xin. Low-energy surface states in the normal state of α-PdBi2 superconductor. United States: N. p., Web. doi:10.1103/PhysRevMaterials.1.034201.
Choi, Hongchul, Neupane, Madhab, Sasagawa, T., Chia, Elbert E. M., & Zhu, Jian-Xin. Low-energy surface states in the normal state of α-PdBi2 superconductor. United States. doi:10.1103/PhysRevMaterials.1.034201.
Choi, Hongchul, Neupane, Madhab, Sasagawa, T., Chia, Elbert E. M., and Zhu, Jian-Xin. 2017. "Low-energy surface states in the normal state of α-PdBi2 superconductor". United States. doi:10.1103/PhysRevMaterials.1.034201. https://www.osti.gov/servlets/purl/1406216.
@article{osti_1406216,
title = {Low-energy surface states in the normal state of α-PdBi2 superconductor},
author = {Choi, Hongchul and Neupane, Madhab and Sasagawa, T. and Chia, Elbert E. M. and Zhu, Jian-Xin},
abstractNote = {Topological superconductors as characterized by Majorana surface states have been actively searched for their significance in fundamental science and technological implication. The large spin-orbit coupling in Bi-Pd binaries has stimulated extensive investigations on the topological surface states in these superconducting compounds. Here we report a study of normal-state electronic structure in a centrosymmetric α-PdBi2 within density functional theory calculations. By investigating the electronic structure from the bulk to slab geometries in this system, we predict for the first time that α-PdBi2 can host orbital-dependent and asymmetric Rashba surface states near the Fermi energy. This study suggests that α-PdBi2 will be a good candidate to explore the relationship between superconductivity and topology in condensed matter physics.},
doi = {10.1103/PhysRevMaterials.1.034201},
journal = {Physical Review Materials},
number = 3,
volume = 1,
place = {United States},
year = {2017},
month = {8}
}

Works referenced in this record:

Generalized Gradient Approximation Made Simple
journal, October 1996
  • Perdew, John P.; Burke, Kieron; Ernzerhof, Matthias
  • Physical Review Letters, Vol. 77, Issue 18, p. 3865-3868
  • DOI: 10.1103/PhysRevLett.77.3865

Colloquium: Topological insulators
journal, November 2010