PHase fluctuations in two-dimensional superconducting weakly coupled wire networks

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 ma...

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Bibliographic Details
Published in:Physical review. B, Condensed matter Condensed matter, 1990-08, Vol.42 (4), p.2647-2650
Main Authors: VAN DER ZANT, H. S. J, WEBSTER, M. N, ROMIJN, J, MOOIJ, J. E
Format: Article
Language:English
Subjects:
426001 - Engineering- Superconducting Devices & Circuits- (1990-)
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Condensed matter: electronic structure, electrical, magnetic, and optical properties
ELEMENTS
Exact sciences and technology
FLUCTUATIONS
JOSEPHSON JUNCTIONS
JUNCTIONS
METALS
NETWORK ANALYSIS
NIOBIUM
Other topics in superconductivity
PHASE STUDIES
Physics
SEMIMETALS
SILICON
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTING WIRES
Superconductivity
TRANSITION ELEMENTS
VARIATIONS
WIRES
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Summary: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.
ISSN:0163-1829
1095-3795
DOI:10.1103/PhysRevB.42.2647