Hysteretic Critical State in Coplanar Josephson Junction with Monolayer Graphene Barrier
Artikel i vetenskaplig tidskrift, 2017

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 I (c) when turning the field on, and a revival of I (c) 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.

P.

I-87036 Cosenza

D.

CNRS

I-80126 Naples

films

[Rouco

Lucignano

Silicon carbide

supercurrent

Tagliacozzo

[Giuliano

Monte S Angelo Via Cintia

superconductivity

Sweden.

A.] Univ Napoli

Italy.

A.] INFN

Grp Coll Cosenza

D.

France.

transition

V.

Lab Charles Coulomb UMR 5221

Italy.

[Giuliano

F-34095 Montpellier

Josephson effect

Dept Microtechnol & Nanosci

D.] Univ Calabria Arcavacata Rende

transistors

resistance

R SPIN

[Jouault

grain

F.] Chalmers

Campagnano

Stornaiuolo

[Lombardi

G.

weak links

Pepe

SE-41296 Gothenburg

Italy.

Tagliacozzo

Dipartimento Fis

B.] Univ Montpellier

I-87036 Cosenza

Graphene

transport

G. P.

Physics

phase

Författare

D. Massarotti

Università degli Studi della Campania Luigi Vanvitelli

Superconductors, oxides and other innovative materials and devices

B. Jouault

Laboratoire Charles Coulomb

V. Rouco

Universita degli Studi di Napoli Federico II

G. Campagnano

Universita degli Studi di Napoli Federico II

Superconductors, oxides and other innovative materials and devices

D. Giuliano

Istituto Nazionale Di Fisica Nucleare, Frascati

Universita della Calabria

P. Lucignano

Superconductors, oxides and other innovative materials and devices

Universita degli Studi di Napoli Federico II

D. Stornaiuolo

Superconductors, oxides and other innovative materials and devices

Universita degli Studi di Napoli Federico II

G. P. Pepe

Universita degli Studi di Napoli Federico II

Superconductors, oxides and other innovative materials and devices

Floriana Lombardi

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

F. Tafuri

Università degli Studi della Campania Luigi Vanvitelli

Superconductors, oxides and other innovative materials and devices

A. Tagliacozzo

Istituto Nazionale Di Fisica Nucleare, Frascati

Universita degli Studi di Napoli Federico II

Superconductors, oxides and other innovative materials and devices

Journal of Superconductivity and Novel Magnetism

1557-1939 (ISSN) 1557-1947 (eISSN)

Vol. 30 1 5-14

Drivkrafter

Hållbar utveckling

Styrkeområden

Nanovetenskap och nanoteknik

Ämneskategorier

Nanoteknik

DOI

10.1007/s10948-016-3871-x