Nonequilibrium Campbell length: probing the vortex pinning potential

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dc.creatorProzorov, R.
dc.creatorGiannetta, R. W.
dc.creatorTamegai, T.
dc.creatorGuptasarma, P.
dc.creatorHinks, D. G.
dc.date2000-04-08
dc.date.accessioned2026-07-07T02:37:19Z
dc.date.available2026-07-07T02:37:19Z
dc.descriptionThe $AC$ magnetic penetration depth $λ(T,H,j)$ was measured in presence of a macroscopic $DC$ (Bean) supercurrent, $j$. In single crystal BSCCO below approximately 28 K, $λ(T,H,j)$ exhibits thermal hysteresis. The irreversibility arises from a shift of the vortex position within its pinning well as $j$ changes. It is demonstrated that below a new irreversibility temperature, the nonequilibrium Campbell length depends upon the ratio $j/j_c$. $λ(T,H,j)$ {\it increases} with $j/j_c$ as expected for a non-parabolic potential well whose curvature {\it decreases} with the displacement. Qualitatively similar results are observed in other high-$T_{c}$ and conventional superconductors.
dc.descriptionSubmitted to PRL
dc.identifierhttps://arxiv.org/abs/cond-mat/0004122
dc.identifierhttp://arxiv.org/abs/cond-mat/0004122
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/16243
dc.subjectSuperconductivity
dc.titleNonequilibrium Campbell length: probing the vortex pinning potential
dc.typetext

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