Vortex structure and Josephson supercurrents in stacked double Josephson junctions

S. N. Song; P. R. Auvil; M. Ulmer; J. B. Ketterson

doi:10.1103/PhysRevB.53.R6018

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Vortex structure and Josephson supercurrents in stacked double Josephson junctions

S. N. Song, P. R. Auvil, M. Ulmer, J. B. Ketterson

DOI 10.1103/PhysRevB.53.R6018 · Physical Review B

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Abstract

In Josephson-junction stacks consisting of two junctions having identical maximum Josephson supercurrent Ic, the measured Ic vs external magnetic flux Φ characteristics exhibit two distinct oscillation periods with the oscillation period for Φ>Φ0 being smaller than that when Φ<Φ0, where Φ0 is the flux quantum. The observations provide clear evidence that a structural phase transformation to a triangular vortex lattice occurs with increasing Φ.

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.	9.2	Pressure unresolved	unknown