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Cooperation between Superconductivity and Magnetism in Mesoscopic systems: towards Majorana states

Total Cost €


EC-Contrib. €






Project "SuperMag" data sheet

The following table provides information about the project.


Organization address
city: ROMA
postcode: 185

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Italy [IT]
 Project website
 Total cost 180˙277 €
 EC max contribution 180˙277 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2014
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2015
 Duration (year-month-day) from 2015-07-01   to  2017-06-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

A major challenge in contemporary physics is to understand and control unconventional states of matter, such as topological superconductors and Majorana fermions (MFs). Once harnessed, this physics offers bright prospects for low-power superconducting digital electronics and fault-tolerant quantum computation. Recent proposals showed that ordered chains of magnetic impurities, in proximity of a superconductor, can hold a MFs. This state come from a precise cooperation between superconductivity and magnetism.

I propose to study this cooperation in a unique system consisting of a nanoscopic metallic island where these two mechanism can be, for the first time, independently controlled. Specifically I will combine two novel technologies for my studies: (i) the superconducting quantum interference proximity transistor (SQUIPT) and (ii) the molecular spin doping. The SQUIPT is a novel device composed by a nanoscopic metallic island in proximity of a superconducting loop able to induce and control superconductivity in the normal metal, whereas molecular spin doping allows for controlled chemical deposition of magnetic impurities in the same normal metal.

My first objective is to study the competition/cooperation between the magnetic and the superconducting correlations induced in the electrons of the nanoscopic metallic island by measuring the amplitude and phase of the superconducting Josephson current. Secondly, I will investigate the effect of the magnetic impurities on the quasi-electrons density of states in such junction.

Successful combination of my bottom-up and top-down approaches will contribute at first instance to the understating of this fundamental competition/cooperation and later to the highly sought-after and ambitious target of the demonstrating MFs in the solid-state. Tunnel spectroscopy measurements of the SQUIPT will reveal the MFs that, at cryogenic temperatures, can emerge in the metallic island properly doped by the magnetic impurities.


year authors and title journal last update
List of publications.
2017 F. Vischi, M. Carrega, E. Strambini, S. D\'Ambrosio, F. S. Bergeret, Yu. V. Nazarov, F. Giazotto
Coherent transport properties of a three-terminal hybrid superconducting interferometer
published pages: , ISSN: 2469-9950, DOI: 10.1103/PhysRevB.95.054504
Physical Review B 95/5 2019-07-24
2015 E. Strambini, F. S. Bergeret, F. Giazotto
Mesoscopic Josephson junctions with switchable current-phase relation
published pages: 17013, ISSN: 0295-5075, DOI: 10.1209/0295-5075/112/17013
EPL (Europhysics Letters) 112/1 2019-07-24
2016 E. Strambini, S. D\'Ambrosio, F. Vischi, F. S. Bergeret, Yu. V. Nazarov, F. Giazotto
The ω-SQUIPT as a tool to phase-engineer Josephson topological materials
published pages: , ISSN: 1748-3387, DOI: 10.1038/nnano.2016.157
Nature Nanotechnology 2019-07-24
2017 J. Tiira, E. Strambini, M. Amado, S. Roddaro, P. San-Jose, R. Aguado, F. S. Bergeret, D. Ercolani, L. Sorba, F. Giazotto
Magnetically-driven colossal supercurrent enhancement in InAs nanowire Josephson junctions
published pages: 14984, ISSN: 2041-1723, DOI: 10.1038/ncomms14984
Nature Communications 8 2019-07-24
2017 Jaakko Mastomäki, Stefano Roddaro, Mirko Rocci, Valentina Zannier, Daniele Ercolani, Lucia Sorba, Ilari J. Maasilta, Nadia Ligato, Antonio Fornieri, Elia Strambini, Francesco Giazotto
InAs nanowire superconducting tunnel junctions: Quasiparticle spectroscopy, thermometry, and nanorefrigeration
published pages: , ISSN: 1998-0124, DOI: 10.1007/s12274-017-1558-7
Nano Research 2019-07-24
2017 Nadia Ligato, Giampiero Marchegiani, Pauli Virtanen, Elia Strambini, Francesco Giazotto
High operating temperature in V-based superconducting quantum interference proximity transistors
published pages: , ISSN: 2045-2322, DOI: 10.1038/s41598-017-09036-0
Scientific Reports 7/1 2019-07-24

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