%0 Journal Article
%T Hysteretic Critical State in Coplanar Josephson Junction with Monolayer Graphene Barrier
%+ Laboratoire Charles Coulomb (L2C)
%A Massarotti, D.
%A Jouault, Benoit
%A Rouco, V.
%A Campagnano, G.
%A Giuliano, D.
%A Lucignano, P.
%A Stornaiuolo, D.
%A Pepe, G. P.
%A Lombardi, F.
%A Tafuri, F.
%A Tagliacozzo, A.
%< avec comité de lecture
%Z L2C:17-102
%@ 1557-1939
%J Journal of Superconductivity and Novel Magnetism
%I Springer Verlag
%V 30
%N 1
%P 5-14
%8 2017-01
%D 2017
%R 10.1007/s10948-016-3871-x
%K Graphene
%K Josephson effect
%K Silicon carbide
%Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Journal articles
%X Coplanar Al/graphene/Al junctions fabricated on the same graphene sheet deposited on silicon carbide (SiC), show robust Josephson coupling at subKelvin temperature, when the separations between the electrodes is below 400 nm. Remarkably, a hysteretic Critical State sets in when ramping an orthogonal magnetic field, with a sudden collapse of the Josephson critical current Ic when turning the field on, and a revival of Ic when inverting the sweep. Similar hysteresis can be found in granular superconducting films which may undergo the Berezinskii-Kosterlitz-Thouless transition. Here, we give quantitative arguments to prove that this odd behavior of the magnetoconductance gives evidence for an incipient Berezinskii-Kosterlitz-Thouless transition with drift and pinning of fluctuating free vortices induced by the current bias.
%G English
%L hal-01588920
%U https://hal.science/hal-01588920
%~ CNRS
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ UM-2015-2021