Phase fluctuations in two-dimensional superconducting weakly coupled wire networks
H. S. J. van der Zant, M. N. Webster, J. Romijn, J. E. Mooij
DOI 10.1103/PhysRevB.42.2647 · Physical Review B
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Abstract
We have fabricated two-dimensional networks of superconducting weakly coupled wires in amorphous niobium-silicon films with high-normal-state sheet resistance. Results of one representative network are presented in detail. Single wires have a width of 100 nm, and the lattice period is 500 nm. The magnetoresistance exhibits oscillations with a period of 1 flux quantum per unit cell. Near zero magnetic field a clear Kosterlitz-Thouless phase transition is present, in good agreement with theoretical predictions. Compared to Josephson-junction arrays, wire networks have a lower vortex mobility.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbSi Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.135 | Pressure not reported | unknown |
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