Dissipation in highly anisotropic superconductors

P. H. Kes, J. Aarts, V. M. Vinokur, C. J. van der Beek
1990 Physical Review Letters  
In layered superconductors with very weak coupling between the layers the concept of a flux-line lattice breaks down when the field is oriented parallel to the superconducting planes. For an arbitrary field orientation we propose that the formation of an Abrikosov lattice is only related to the perpendicular field component. The parallel field component penetrates as if the superconducting planes were completely decoupled. This model explains recent experiments which have questioned the driving
more » ... stioned the driving mechanism for dissipation in the superconducting phase of the high-temperature oxide superconductors. PACS numbers: 74.60.6e, 74.70.Ya Recently, serious questions have been raised about flux creep as the origin of dissipation in high-temperature superconductors. Iye, Nakamura, and Tamegai' reported measurements of the resistivity p in thin films of Bi2Sr2CaCu20s (Bi:2212) at temperatures down to 15 K below T, ( 79 K). When both the magnetic field H and the current I were oriented along the Cu02 planes, p did not change with the variation of the angle p between H and I. Because the macroscopic driving force of a uniform current with density J on a flux-line lattice (FLL) with flux density B is given by Fd J x B, one would ex-
doi:10.1103/physrevlett.64.1063 pmid:10042153 fatcat:rb4ombekhnf55m3gd7iqsx7xve