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Article Dans Une Revue Nature Communications Année : 2017

Two-dimensional topological superconductivity in Pb/Co/Si(111)

Gerbold Ménard
  • Fonction : Auteur
Sébastien Guissart
  • Fonction : Auteur
Christophe Brun
  • Fonction : Auteur
Raphaël Leriche
  • Fonction : Auteur
Mircea Trif
  • Fonction : Auteur
François Debontridder
  • Fonction : Auteur
Dominique Demaille
  • Fonction : Auteur
Pascal Simon
Tristan Cren
  • Fonction : Auteur

Résumé

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 one-dimensional 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.

Dates et versions

hal-04020863 , version 1 (09-03-2023)

Identifiants

Citer

Gerbold Ménard, Sébastien Guissart, Christophe Brun, Raphaël Leriche, Mircea Trif, et al.. Two-dimensional topological superconductivity in Pb/Co/Si(111). Nature Communications, 2017, 8 (1), pp.2040. ⟨10.1038/s41467-017-02192-x⟩. ⟨hal-04020863⟩
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