Univ. Paris-Saclay

Service de Physique de l'Etat Condensé

Signatures of topological superconductivity in Pb/Co-Si(111)
Mercredi 13/03/2019, 11:00-12:00
SPEC Salle Itzykson, Bât.774, Orme des Merisiers

Quantum computing has become one of the main key-words of solid state research over the past few years. In particular, with the objective of fighting quantum decoherence, the accent was put on topological superconductivity. The central element of this theoretical construction are the so-called Majorana quasiparticles. In this presentation I will present our own effort in finding a suitable platform on which to play with these quasiparticles using Scanning Tunneling Microscopy & Spectroscopy on a monolayer of Pb on Si(111).
I will go in detail explaining why the Majoranas are of interest for Quantum computing and describing the route we followed. I will discuss the typical signatures of non-topological individual impurities [1,2] and clusters before comparing them with the very unusual signatures obtained in the case of self-organized Co magnetic nanoclusters [3,4].
[1] G. Ménard et al., Nature Physics 11 1013-1016 (2015).
[2] G. Ménard et al., Eur. Phys. J. Spec. Top. (2019).
[3] G. Ménard et al., Nature communications 8 2040 (2017).
[4] G. Ménard et al., arXiv:1810.09541 (2018).

Work performed at Institut des Nanosciences de Paris CNRS & Sorbonne Université, in the team “Spectroscopy of Novel Quantum States”.

Un café sera servi dans le Hall à 11H


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