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DIII topological superconductivity with emergent time-reversal symmetry

Author(s)
Reeg, Christopher; Schrade, Constantin; Klinovaja, Jelena; Loss, Daniel
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Abstract
We find a class of topological superconductors which possess an emergent time-reversal symmetry that is present only after projecting to an effective low-dimensional model. We show that a topological phase in symmetry class DIII can be realized in a noninteracting system coupled to an s-wave superconductor only if the physical time-reversal symmetry of the system is broken, and we provide three general criteria that must be satisfied in order to have such a phase. We also provide an explicit model which realizes the class DIII topological superconductor in 1D. We show that, just as in time-reversal invariant topological superconductors, the topological phase is characterized by a Kramers pair of Majorana fermions that are protected by the emergent time-reversal symmetry.
Date issued
2017-10
URI
http://hdl.handle.net/1721.1/112970
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review B
Publisher
American Physical Society
Citation
Reeg, Christopher et al. "DIII topological superconductivity with emergent time-reversal symmetry." Physical Review B 96, 16 (October 2017): 161407(R) © 2017 American Physical Society
Version: Final published version
ISSN
2469-9950
2469-9969

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