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.

Josephson effect

Graphene

Silicon carbide

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

Università della Calabria

P. Lucignano

Universita degli Studi di Napoli Federico II

Superconductors, oxides and other innovative materials and devices

D. Stornaiuolo

Universita degli Studi di Napoli Federico II

Superconductors, oxides and other innovative materials and devices

G. P. Pepe

Universita degli Studi di Napoli Federico II

Superconductors, oxides and other innovative materials and devices

Floriana Lombardi

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

F. Tafuri

Superconductors, oxides and other innovative materials and devices

Università degli Studi della Campania Luigi Vanvitelli

A. Tagliacozzo

Universita degli Studi di Napoli Federico II

Superconductors, oxides and other innovative materials and devices

Istituto Nazionale di Fisica Nucleare

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

Den kondenserade materiens fysik

DOI

10.1007/s10948-016-3871-x

Mer information

Senast uppdaterat

2022-04-06