Josephson vortices and solitons inside pancake vortex lattice in layered superconductors

A. E. Koshelev
Phys. Rev. B 68, 094520 – Published 29 September 2003
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Abstract

In very anisotropic layered superconductors a tilted magnetic field generates crossing vortex lattices of pancake and Josephson vortices (JV’s). We study the properties of an isolated JV in the lattice of pancake vortices. JV induces deformations in the pancake vortex crystal, which, in turn, substantially modify the JV structure. The phase field of the JV is composed of two types of phase deformations: the regular phase and vortex phase. The phase deformations with smaller stiffness dominate. The contribution from the vortex phase smoothly takes over with increasing magnetic field. We find that the structure of the cores experiences a smooth yet qualitative evolution with decrease of the anisotropy. At large anisotropies pancakes have only small deformations with respect to position of the ideal crystal, while at smaller anisotropies the pancake stacks in the central row smoothly transfer between the neighboring lattice positions forming a solitonlike structure. We also find that even at high anisotropies pancake vortices strongly pin JV’s and strongly increase their viscous friction.

  • Received 9 May 2003

DOI:https://doi.org/10.1103/PhysRevB.68.094520

©2003 American Physical Society

Authors & Affiliations

A. E. Koshelev

  • Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA

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Vol. 68, Iss. 9 — 1 September 2003

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