Summary: Exotic vortex states in layered superconductors created
by tilted magnetic field: Josephson vortices, solitons,
vortex chains. . .
Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA
In very anisotropic layered superconductors tilted magnetic field generates two interpenetrating vortex sublattices.
This set of crossing lattices contains a sublattice of Josephson vortices (JVs) and a sublattice of pancake vortex (PV)
stacks. The PV sublattice modifies structure of an isolated JV. The JV phase field is composed of the regular and vortex
phases. The contribution from the vortex phase smoothly takes over with increase of the magnetic field. The core
structure experiences qualitative evolution with anisotropy decrease. At large anisotropies JV weakly distorts PV crystal
and the JV core contains many PV rows. At smaller anisotropies the JV core shrinks to one PV row and PV stacks in
this central row form a soliton-like structure. At very small c-axis field ( K 1 G) the PV stacks form chains located at
JVs. At certain field the crossing-lattices chains transform into the tilted-vortices chains. We present a simple criterion
for this transition.
Ó 2004 Elsevier B.V. All rights reserved.
Keywords: Layered superconductors; Vortex lattices; Josephson vortices; Pancake vortices
Vortex phase diagram of layered superconductors in