Abstract

We have studied phase transitions in fabricated 2D arrays of Josephson junctions where the charging and Josephson coupling energies are about equal. We find a crossover from superconducting behavior in low fields to insulating behavior for fields above a critical value of 0.1--0.2 flux quanta per unit cell. The quantitative aspects agree well with predictions from a recent theory for quantum vortex motion by M. P. A. Fisher and with measurements on films. Similar transitions are found around values f=n/m, where f is the flux per cell and n,m=1,2,3. The field dependence is periodic in f with period 1.

Keywords

Josephson effectCondensed matter physicsSuperconductivityPhysicsPi Josephson junctionMagnetic flux quantumJosephson energyInsulator (electricity)Josephson phaseVortexField (mathematics)Magnetic fluxMagnetic fieldQuantum mechanicsOptoelectronics

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Publication Info

Year
1992
Type
article
Volume
69
Issue
20
Pages
2971-2974
Citations
184
Access
Closed

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Herre S. J. van der Zant, F. C. Fritschy, W. J. Elion et al. (1992). Field-induced superconductor-to-insulator transitions in Josephson-junction arrays. Physical Review Letters , 69 (20) , 2971-2974. https://doi.org/10.1103/physrevlett.69.2971

Identifiers

DOI
10.1103/physrevlett.69.2971
PMID
10046688

Data Quality

Data completeness: 81%