Published by the American Physical Society through the American Institute of Physics
Physical Review B, Condensed Matter and Materials Physics vol:83 issue:2
We predict that in a bulk type-1.5 superconductor, the competing magnetic responses of the two components
of the order parameter can result in group-stabilized giant vortices and individual rings of vortices in the absence
of any extrinsic pinning or confinement mechanism. We also determine within the Ginzburg-Landau theory a
condition for the robustness of type 1.5 in the vicinity of the critical temperature, and we find a rich phase diagram
with successions of behaviors such as type 1→type 1.5→type 2→type 1.5 when temperature decreases.