Dynamics of the phase transition in proximity-effect arrays of Josephson junctions at full frustration
Ph. Lerch, Ch. Leemann, R. Theron, P. Martinoli
DOI 10.1103/PhysRevB.41.11579 · Physical Review B
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Abstract
With a mutual-inductance method the effective kinetic inductance of square arrays of 106 proximity-effect Pb-Cu-Pb Josephson junctions was measured. The magnetic field was tuned to achieve full frustration f=1/2, the frustration parameter f==Φ/φ0 being the ratio of the applied magnetic flux Φ per unit cell of the array and the superconducting flux quantum φ0. A test of the temperature dependence of the free vortex correlation length as well as of the helicity modulus was performed and found to be consistent with a description of the phase transition at f=1/2 within the framework of the Kosterlitz-Thouless-Berezinski ideas. The results do not, however, provide information concerning the possible presence of an Ising-like transition, which may exist in the fully frustrated case.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.2 | Pressure not reported | unknown |
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