Journal Article

FZJ-2024-04278

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Helical Topological Superconducting Pairing at Finite Excitation Energies

Bahari, M. (Corresponding author) ; Zhang, S.-B. ; Li, C.-A. ; Choi, S.-J. ; Rüßmann, P.FZJ* ; Timm, C. ; Trauzettel, B.

2024
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/PhysRevLett.132.266201  doi:10.34734/FZJ-2024-04278

Abstract: We propose helical topological superconductivity away from the Fermi surface in three-dimensional time-reversal-symmetric odd-parity multiband superconductors. In these systems, pairing between electrons originating from different bands is responsible for the corresponding topological phase transition. Consequently, a pair of helical topological Dirac surface states emerges at finite excitation energies. These helical Dirac surface states are tunable in energy by chemical potential and strength of band splitting. They are protected by time-reversal symmetry combined with crystalline twofold rotation symmetry. We suggest concrete materials in which this phenomenon could be observed.

Note: arXiv preprint available at: https://doi.org/10.48550/arXiv.2210.11955

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (PGI-1)

Research Program(s):

1. 5211 - Topological Matter (POF4-521) (POF4-521)

Appears in the scientific report 2024

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