期刊
PHYSICAL REVIEW LETTERS
卷 112, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.112.106401
关键词
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资金
- AFOSR [FA9550-10-1-0459]
- ONR [N0014-11-1-0728]
- NSF CAREER [ONR-N00014-11-1-0635, DMR-095242, Darpa-N66001-11-1-4110]
- David and Lucile Packard Foundation
- [ONR-N00014-11-1-0728]
- [Darpa-N66001-11-1-411]
- [MURI-130-6082]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0952428] Funding Source: National Science Foundation
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.
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