Critical phase fluctuations in superconducting wire networks
B. Jeanneret, Ph. Flückiger, J. L. Gavilano, Ch. Leemann, P. Martinoli
DOI 10.1103/PhysRevB.40.11374 · Physical Review B
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Abstract
A study of the onset of superconducting phase coherence in periodic wire networks with weakly coupled adjacent nodes is presented. In a narrow temperature range below the mean-field critical temperature, ac conductance measurements reveal a drop in superfluid density and a peak in dissipation providing the first observation in networks of the vortex unbinding transition predicted by the Kosterlitz-Thouless theory. The ac response in the critical region is accurately described by dynamical extensions of the theory incorporating vortex-pinning phenomena created by the periodic structure of the network.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.146 | Pressure not reported | unknown |
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