Spontaneous Pattern Formation in Intertype Superconducting Films
arXiv:1812.09621 · doi:10.1088/1361-648X/ab5379
Abstract
Thin superconducting films are usually regarded as type II superconductors even when they are made of a type I material. The reason is a strong contribution of the stray magnetic field that stabilizes vortices. While very thin films indeed reach this limit, there is a large interval of film thicknesses where the magnetic properties cannot be classified as either of the two conventional superconductivity types. Recent calculations revealed that in this interval the system exhibits spontaneous formation of complex condensate-field patterns that are very sensitive to system parameters, in particular, the temperature and the applied magnetic field. The corresponding superconducting magnetic properties can be attributed to a special regime of the intertype superconductivity whose physical origin lies in the removal of an infinite degeneracy of the self-dual superconducting state at the critical Bogomolnyi point. Here we demonstrate that qualitative characteristics of the intertype superstructures in thin superconducting films are independent of the choice of the in-plane boundary conditions for the order parameter and the magnetic field.
5 figures
References in corpus (16)
- Patterns and Collective Behavior in Granular Media: Theoretical Concepts
- Vortex phase diagram for mesoscopic superconducting disks
- Type-1.5 Superconductors
- Giant Vortex Clusters in a Two-Dimensional Quantum Fluid
- Vortex matter in mesoscopic two-gap superconducting disks: influence of Josephson and magnetic coupling
- Morphology of the Superconducting Vortex Lattice in Ultra-Pure Niobium
- Theory of superconductor with kappa close to 1/sqrt{2}
- Confinement effects on intermediate state flux patterns in mesoscopic type-I superconductors
- Thermodynamics and magnetic field profiles in low-kappa type-II superconductors
- The BCS-BEC crossover induced by a shallow band: Pushing standard superconductivity types apart
- Transverse vortex commensurability effect and sign change of the Hall voltage in superconducting YBaCuO thin films with a nanoscale periodic pinning landscape
- Paramagnetic Meissner effect in ZrB12 single crystal with non-monotonic vortex-vortex interactions
- Motion of Vacancies in a Pinned Vortex Lattice: Origin of the Hall Anomaly
- Giant vortex states in type I superconductors simulated by Ginzburg-Landau equations
- Doubly Quantized Vortices in Bulk Ginzburg-Landau Superconductors
- Simple Vortex States in Films of Type-I Ginzburg-Landau Superconductor