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 Z2 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.
Original language | English (US) |
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Article number | 106401 |
Journal | Physical review letters |
Volume | 112 |
Issue number | 10 |
DOIs | |
State | Published - Mar 10 2014 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy