Hysteretic Critical State in Coplanar Josephson Junction with Monolayer Graphene Barrier
Journal article, 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.

Stornaiuolo

Graphene

France.

Italy.

Physics

grain

A.] Univ Napoli

transport

Sweden.

D.

G.

Lucignano

Dipartimento Fis

A.] INFN

[Giuliano

B.] Univ Montpellier

superconductivity

I-80126 Naples

transition

Campagnano

F-34095 Montpellier

Lab Charles Coulomb UMR 5221

V.

G. P.

Pepe

films

Josephson effect

P.

weak links

Tagliacozzo

Silicon carbide

supercurrent

transistors

I-87036 Cosenza

CNRS

[Lombardi

I-87036 Cosenza

R SPIN

[Jouault

Tagliacozzo

resistance

SE-41296 Gothenburg

Italy.

phase

Italy.

Grp Coll Cosenza

F.] Chalmers

Dept Microtechnol & Nanosci

[Giuliano

D.

D.] Univ Calabria Arcavacata Rende

Monte S Angelo Via Cintia

[Rouco

Author

D. Massarotti

Università degli Studi della Campania Luigi Vanvitelli

Superconductors, oxides and other innovative materials and devices

B. Jouault

Laboratoire Charles Coulomb

V. Rouco

University of Naples Federico II

G. Campagnano

Superconductors, oxides and other innovative materials and devices

University of Naples Federico II

D. Giuliano

University of Calabria

National Institute for Nuclear Physics

P. Lucignano

Superconductors, oxides and other innovative materials and devices

University of Naples Federico II

D. Stornaiuolo

Superconductors, oxides and other innovative materials and devices

University of Naples Federico II

G. P. Pepe

University of Naples Federico II

Superconductors, oxides and other innovative materials and devices

Floriana Lombardi

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

F. Tafuri

Superconductors, oxides and other innovative materials and devices

Università degli Studi della Campania Luigi Vanvitelli

A. Tagliacozzo

University of Naples Federico II

National Institute for Nuclear Physics

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

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (SO 2010-2017, EI 2018-)

Subject Categories

Nano Technology

DOI

10.1007/s10948-016-3871-x

More information

Latest update

8/12/2020