Matthieu Desjardin

Jeudi 27 Avril 2017 à 14h00
Amphi Holweck, Esc C
1ème etage

Synthetic spin-orbit interaction for Majorana devices

Abstract : The engineering of topological superconducting correlations in quantum devices hold promise for new schemes of quantum computation. A wide class of systems which are expected to exhibit such exotic states are based on conductors with strong spin-orbit interaction subject to a strong external magnetic field. Here, we show how these states can be autonomously induced by using a magnetic texture coupled to any quasi one dimensional conductor- a single wall carbon nanotube in our case. We observe oscillations of subgap states as a function of the external magnetic field and the emergence of a robust zero energy state at zero magnetic field, the hallmark of devices hosting localized Majorana modes.
Our findings could be used for advanced experiments, including microwave spectroscopy and braiding operations.

Authors :
M.M. Desjardins1,†, L.C. Contamin1,†, M.C Dartiailh1, L.E. Bruhat1, T.
Cubaynes1, J.J. Viennot2, F. Mallet1, S. Rohart3, A. Thiaville3, A.
Cottet1 and T. Kontos1
Affiliations :
1 Laboratoire Pierre Aigrain, Ecole Normale Supérieure-PSL Research University, CNRS, Université Pierre et Marie Curie-Sorbonne Universités, Université Paris Diderot-Sorbonne Paris Cité, 24 rue Lhomond, 75231 Paris Cedex 05, France
2 JILA and Department of Physics, University of Colorado, Boulder, Colorado, 80309, USA 3Laboratoire de Physique des Solides, Université Paris-Sud et CNRS, Bât.
510, 91405 Orsay Cedex
† These authors contributed equally to this work.

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