Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 32: Focus Session: Chiral Topological Superconductors and Majorana Fermions
TT 32.5: Hauptvortrag
Dienstag, 13. März 2018, 11:45–12:15, H 0104
Experimental Hints of Topological Superconductivity in Hybrid Ferromagnet-Superconductor Systems — Gerbold Ménard1, Sébastien Guissart2, Christophe Brun1, Raphaël Leriche1, Mircea Trif2, François Debontridder1, Dominique Demaille1, Dimitri Roditchev3, Pascal Simon2, and •Tristan Cren1 — 1Institut des Nanosciences de Paris, CNRS & Sorbonne University, Paris, France — 2Laboratoire de Physique des Solides, CNRS & Paris-Saclay University, Orsay, France — 3Laboratoire de physique et d’étude des matériaux, ESPCI, Paris, France
Just like insulators can present topological phases characterized by Dirac edge states, superconductors can exhibit topological phases characterized by Majorana edge states. One-dimensional topological superconductors are predicted to host zero energy Majorana fermions at their extremities. Zero bias anomalies localized at the edge of proximity induced superconducting wires were recently interpreted as fingerprints of the emergence of topological superconductivity [1,2]. By contrast, 2D superconductors have a one-dimensional boundary which would naturally lead to propagating Majorana edge states characterized by a Dirac-like dispersion. These dispersive Majorana edge states were recently observed in a Pb monolayer coupled to a nanomagnet [3]. The topological order was confirmed by the observation of Majorana bound states in vortex cores in this system.
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