Low-energy surface states in the normal state of α-PdBi2 superconductor

Choi, Hongchul; Neupane, Madhab; Sasagawa, T.; Chia, Elbert E.  M.; Zhu, Jian-Xin

doi:10.1103/PhysRevMaterials.1.034201

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

Journal Article · Fri Aug 25 00:00:00 EDT 2017 · Physical Review Materials

DOI:https://doi.org/10.1103/PhysRevMaterials.1.034201· OSTI ID:1406216

Choi, Hongchul ^[1]; Neupane, Madhab ^[2]; Sasagawa, T. ^[3]; Chia, Elbert E. M. ^[4]; Zhu, Jian-Xin ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of Central Florida, Orlando, FL (United States)
Tokyo Inst. of Technology (Japan)
Nanyang Technological Univ. (Singapore)

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.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1406216

Alternate ID(s):: OSTI ID: 1376943

Report Number(s):: LA-UR-17-22900; PRMHAR; TRN: US1703258

Journal Information:: Physical Review Materials, Vol. 1, Issue 3; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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