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 ITα G with α G as low as 1/3. This observation is in sharp contrast to the known Josephson junction behavior where σ ITα J 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 language | English (US) |
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Article number | 097003 |
Journal | Physical review letters |
Volume | 108 |
Issue number | 9 |
DOIs | |
State | Published - Feb 28 2012 |
ASJC Scopus subject areas
- General Physics and Astronomy