Mesoscopic Fluctuations of the Critical Current in a Superconductor—Normal-Conductor—Superconductor

Hideaki Takayanagi; Jørn Bindslev Hansen; Junsaku Nitta

doi:10.1103/PhysRevLett.74.166

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Mesoscopic Fluctuations of the Critical Current in a Superconductor—Normal-Conductor—Superconductor

Hideaki Takayanagi, Jørn Bindslev Hansen, Junsaku Nitta

DOI 10.1103/PhysRevLett.74.166 · Physical Review Letters

T1

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Abstract

Mesoscopic fluctuations are observed for the critical current in a superconductor—normal-conductor—superconductor junction using the inversion layer of p-type InAs as the normal conductor. As a function of the gate voltage (i.e., the Fermi energy) the critical current and the conductance exhibit mesoscopic fluctuations in both the weak and the strong localization regimes. The magnitude and the typical period of the fluctuations are discussed and compared to theoretical predictions.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	6	Pressure not reported	onset