Vortex and fluxon phase transitions in layered superconductors
Baruch Horovitz
DOI 10.1103/PhysRevLett.67.378 · Physical Review Letters
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Abstract
The system of superconducting layers with Josephson coupling J is studied. The ordering temperature Tf for the fluxon loops parallel to the layers is shown to determine the transition temperature Tc of the system, except when J is exponentially small; in the latter case Tc drops towards the J=0 vortex transition, accounting for data on YBa2Cu3O7/PrBa2Cu3O7 superlattices. A magnetic field parallel to the layers produces a sequence of phases in which the induced fluxon lines are l layers apart. For l>8 nd J not too small, phases with two-dimensional fluxon correlations occur near Tc; this accounts for the observed V∼la(T) current-voltage relation in high-Tc superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl2Ba2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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