1. Two-dimensional topological superconductivity in Pb/Co/Si(111).
- Author
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Ménard, Gerbold C., Guissart, Sébastien, Brun, Christophe, Leriche, Raphaël T., Trif, Mircea, Debontridder, François, Demaille, Dominique, Roditchev, Dimitri, Simon, Pascal, and Cren, Tristan
- Subjects
SUPERCONDUCTIVITY ,MAJORANA fermions ,SUPERCONDUCTORS ,MONOMOLECULAR films ,HIGH temperature superconductors ,SUPERCONDUCTING transitions - Abstract
Just like insulators can present topological phases characterized by Dirac edge states, superconductors can exhibit topological phases characterized by Majorana edge states. In particular, one-dimensional topological superconductors are predicted to host zero-energy Majorana fermions at their extremities. By contrast, two-dimensional superconductors have a one-dimensional boundary which would naturally lead to propagating Majorana edge states characterized by a Dirac-like dispersion. In this paper we present evidences of onedimensional dispersive in-gap edge states surrounding a two-dimensional topological superconducting domain consisting of a monolayer of Pb covering magnetic Co-Si islands grown on Si(111). We interpret the measured dispersive in-gap states as a spatial topological transition with a gap closure. Our method could in principle be generalized to a large variety of heterostructures combining a Rashba superconductor with a magnetic layer in order to be used as a platform for engineering topological quantum phases. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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