Vortices 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.50.340

← Back to search

Vortices 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.50.340 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We have fabricated superconducting weakly coupled wire networks made in thin amorphous niobium-silicon films of high normal-state resistivity and have investigated vortex dynamics in these networks. For the temperatures of interest, the wires have a width in the order of, and a length much larger than the Ginzburg-Landau (GL) coherence length. We find that the vortex mobility in the wire networks is much lower than in Josephson junction arrays. The ratio of the length of the single wires to the GL coherence length determines whether a Kosterlitz-Thouless-Berezinskii transition can be observed in zero field, as well as oscillations at low temperatures in the magnetoresistance. At low temperatures the critical current does not show oscillations in a magnetic field, which might be a consequence of the existence of special vortex configurations in networks with a linear current-phase relation.

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.	—	Pressure not reported	unknown