Large sample-to-sample fluctuations of the nonequilibrium critical current through mesoscopic Josephson junctions

2000/04/12 by P. Samuelsson, Peter Samuelsson, Henning Schomerus +1
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.63.054512

published as Phys. Rev. B 63, 054512 (2001) · 4 pages, 3 figures

arxiv created 2000/04/12 · openalex publication_date 2001/01/11 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present a theory for the nonequilibrium current in a mesoscopic Josephson junction which is coupled to a normal electron reservoir, and apply it to a chaotic junction. Large sample-to-sample fluctuations of the critical current I_c are found, with rms I_c\ensuremath≃√(N)e\ensuremathΔ/\ensuremath\Elzxh, when the voltage difference eV between the electron reservoir and the junction exceeds the superconducting gap \ensuremathΔ and the number of modes N connecting the junction to the superconducting electrodes is large.

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