Re-entrant I-V characteristic in layered superconductors
I. B. Khalfin, V. A. Larkin, B. Ya. Shapiro, V. Oboznov
DOI 10.1103/PhysRevB.46.11243 · Physical Review B
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Abstract
The pinning of Abrikosov vortices is investigated both theoretically and experimentally in an artificially prepared Cu-Nb layered system. It is shown that large spatial inhomogeneities can pin a large number of vortices in spite of strong intervortex repulsion and that pinning centers can absorb free vortices from the bulk. The important role of a potential barrier for penetration of vortices into the pinning center is shown. This process leads to the restoration of superconducting properties at large external current.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Cu-Nb 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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