Vortex motion in two-dimensional arrays of small, underdamped Josephson junctions

T. S. Tighe; A. T. Johnson; M. Tinkham

doi:10.1103/PhysRevB.44.10286

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Vortex motion in two-dimensional arrays of small, underdamped Josephson junctions

T. S. Tighe, A. T. Johnson, M. Tinkham

DOI 10.1103/PhysRevB.44.10286 · Physical Review B

T1

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Abstract

We report measurements on vortex motion in two-dimensional arrays of small, underdamped, superconducting tunnel junctions, having charging energies on the order of the Josephson coupling energy. Our measurements are consistent with a simple model of the array as a periodic pinning potential, with measured values of the depinning current and the barrier energy in general agreement with the predicted values. Although the individual junctions are underdamped, the vortices move in an overdamped manner, with a critical velocity. We report preliminary evidence for macroscopic quantum tunneling of vortices.

Source-reported materials — not catalogue approval

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