Pb–Graphene–Pb Josephson Junctions: Characterization in Magnetic Field

Author

Borzenets, I.V. ; Coskun, U.C. ; Mebrahtu, H. ; Finkelstein, G.

Author_Institution

Duke Univ., Durham, NC, USA

Volume

22

Issue

5

fYear

2012

Firstpage

1800104

Lastpage

1800104

Abstract

We fabricate superconductor-graphene-superconductor Josephson junctions with superconducting regions made of lead (Pb). The critical current through graphene may be modulated by the external magnetic field; the resulting Fraunhofer interference pattern shows several periods of oscillations, suggesting that the junction is uniform. Deviations from the perfect Fraunhofer pattern are observed, and their cause is explained by a simulation that takes into account the sample design.

Keywords

Josephson effect; critical current density (superconductivity); graphene; lead; oscillations; superconducting materials; superconductor-normal-superconductor devices; Fraunhofer interference pattern; Pb-C-Pb; Pb-graphene-Pb Josephson junctions; critical current; external magnetic field; magnetic field characterization; oscillations; superconducting regions; superconductor-graphene-superconductor Josephson junctions; Critical current; Josephson junctions; Junctions; Magnetic tunneling; Superconducting magnets; Temperature measurement; Josephson junctions; superconducting device measurements; superconducting films; superconducting materials; superconductor–normal–superconductor devices;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2012.2198472

Filename

6214574