Distribution of supercurrent switching in graphene under the proximity effect

U. C. Coskun, M. Brenner, T. Hymel, V. Vakaryuk, A. Levchenko, A. Bezryadin

Research output: Contribution to journalArticle

Abstract

We study the stochastic nature of switching current in hysteretic current-voltage characteristics of superconductor-graphene-superconductor junctions. We find that the dispersion of the switching current distribution scales with temperature as σ IG with α G as low as 1/3. This observation is in sharp contrast to the known Josephson junction behavior where σ IJ with α J=2/3. We propose an explanation using a generalized version of Kurkijärvi's theory for the flux stability in rf-SQUID and attribute this anomalous effect to the temperature dependence of the critical current which persists down to low temperatures.

Original languageEnglish (US)
Article number097003
JournalPhysical review letters
Volume108
Issue number9
DOIs
StatePublished - Feb 28 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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