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New Class of Topological Superconductors Protected by Magnetic Group Symmetries

Author(s): Fang, Chen; Gilbert, Matthew J; Bernevig, Bogdan A

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Abstract: We study a new type of three-dimensional topological superconductor that exhibits Majorana zero modes (MZM) protected by a magnetic group symmetry, a combined antiunitary symmetry composed of a mirror reflection and time reversal. This new symmetry enhances the noninteracting topological classification of a superconducting vortex from Z(2) to Z, indicating that multiple MZMs can coexist at the end of one magnetic vortex of unit flux. Especially, we show that a vortex binding two MZMs can be realized on the (001) surface of a topological crystalline insulator SnTe with proximity induced BCS Cooper pairing, or in bulk superconductor InxSn1-xTe.
Publication Date: 10-Mar-2014
Citation: Fang, Chen, Gilbert, Matthew J, Bernevig, B Andrei. (2014). New Class of Topological Superconductors Protected by Magnetic Group Symmetries. PHYSICAL REVIEW LETTERS, 112 (10.1103/PhysRevLett.112.106401
DOI: doi:10.1103/PhysRevLett.112.106401
ISSN: 0031-9007
EISSN: 1079-7114
Type of Material: Journal Article
Journal/Proceeding Title: PHYSICAL REVIEW LETTERS
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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