On the absence of Shapiro-like steps in certain mesoscopic S-N-S junctions

Details On the absence of Shapiro-like steps in certain mesoscopic S-N-S junctions On the absence of Shapiro-like steps in certain mesoscopic S-N-S junctions

1997-03-12

arxiv.org/abs/cond-mat/9703114v1

Physics

Condensed Matter

Superconductivity

1 page, to be published in PRL (as Comment)

Scientific paper

10.1103/PhysRevLett.78.2678

In DC transport through mesoscopic S-N-S junctions, it is known that the Josephson coupling decreases exponentially with increasing temperature, but the phase dependence of the conductance persists to much higher temperatures and decreases only as 1/T. It is pointed out here that, despite the fact that such a phase-dependent conductance does bring about an AC current for a pure DC voltage, it cannot, by itself, lead to the formation of Shapiro steps.

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