Transition to a Superconductor with Insulating Cavities

Abstract

An extreme type II superconductor with internal insulating regions, namely cavities, is studied here. We find that the cavity-bearing superconductor has lower energy than the defect-free superconductor above a critical magnetic induction $B^{\ast }$ for insulating cavities but not for metallic ones. Using a numerical approach for the Ginzburg-Landau theory we compute and compare free energy densities for several cavity radii and at least for two cavity densities, assuming a cubic lattice of spherical cavities.

7 pages, 4 figures, to be published in Europhysics Letters

References in corpus (1)

• Magnetic Properties of the transition to localized superconductivity around columnar defects

Cited by in corpus (5)

• Effect of the boundary condition on the vortex patterns in mesoscopic three-dimensional superconductors - disk and sphere
• Transverse magnetization and torque in asymmetrical mesoscopic superconductors
• Critical vortex line length near a zigzag of pinning centers
• Effects of boundaries in mesoscopic superconductors
• Three-dimensional Ginzburg-Landau simulation of a vortex line displaced by a zigzag of pinning spheres