Josephson current in ballistic superconductor-graphene systems

Imre Hagymási, Andor Kormányos, J. Cserti

Research output: Article

37 Citations (Scopus)

Abstract

We calculate the phase, the temperature and the junction length dependence of the supercurrent for ballistic graphene Josephson junctions. For low temperatures we find nonsinusoidal dependence of the supercurrent on the superconductor phase difference for both short and long junctions. The skewness, which characterizes the deviaton of the current-phase relation from a simple sinusoidal one, shows a linear dependence on the critical current for small currents. We discuss the similarities and differences with respect to the classical theory of Josephson junctions, where the weak link is formed by a diffusive or ballistic metal. The relation to other recent theoretical results on graphene Josephson junctions is pointed out and the possible experimental relevance of our work is considered as well.

Original languageEnglish
Article number134516
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number13
DOIs
Publication statusPublished - okt. 12 2010

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Ballistics
Josephson junctions
Graphene
ballistics
Superconducting materials
graphene
Critical currents
skewness
Metals
Temperature
critical current
metals
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Josephson current in ballistic superconductor-graphene systems. / Hagymási, Imre; Kormányos, Andor; Cserti, J.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 82, No. 13, 134516, 12.10.2010.

Research output: Article

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