1993
DOI: 10.1103/physrevb.47.2936
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Two- and three-dimensional flux unbinding inYBa2Cu3

Abstract: A vortex-unbinding mechanism for dissipation in epitaxial thin-film microstrips of YBa,Cu30, is established for zero and small magnetic fields. Excellent self-consistent quantitative agreement is found with the two-dimensional Ginzburg-Landau Coulomb gas theory at low currents above the Kosterlitz-Thouless temperature Tt, , and with a simple nucleation theory for three-dimensional vortex rings at higher currents and lower temperatures.

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Cited by 5 publications
(5 citation statements)
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“…Since the current j m decreases outside a surface layer of thickness ∼ λ, the interaction of the applied magnetic field and the vortex half-ring depends strongly on the size of the vortex ρ v . If ρ v ≪ 1, the vortex line is located wholly in the area where the current density j m is distributed uniformly, and ∆W ∼ ρ v 2 [14,15,16].…”
Section: Discussion Of the Resultsmentioning
confidence: 99%
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“…Since the current j m decreases outside a surface layer of thickness ∼ λ, the interaction of the applied magnetic field and the vortex half-ring depends strongly on the size of the vortex ρ v . If ρ v ≪ 1, the vortex line is located wholly in the area where the current density j m is distributed uniformly, and ∆W ∼ ρ v 2 [14,15,16].…”
Section: Discussion Of the Resultsmentioning
confidence: 99%
“…which is a good approximation of the exact expression (16) at the large values of spectral variable u. In the other limiting case ( q, u ≪ 1, uρ v ≪ 1 ) it is convenient to represent the spectral function S v (q, u) (16) as…”
Section: Vortex Half-ring Near the Surface Of A Superconductormentioning
confidence: 99%
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