Giant paramagnetic Meissner effect in multiband superconductors

Abstract

Superconductors, ideally diamagnetic when in the Meissner state, can also exhibit paramagnetic behavior due to trapped magnetic flux. In the absence of pinning such paramagnetic response is weak, and ceases with increasing sample thickness. Here we show that in multiband superconductors paramagnetic response can be observed even in slab geometries, and can be far larger than any previous estimate - even multiply larger than the diamagnetic Meissner response for the same applied magnetic field. We link the appearance of this giant paramagnetic response to the broad crossover between conventional Type-I and Type-II superconductors, where Abrikosov vortices interact non-monotonically and multibody effects become important, causing unique flux configurations and their locking in the presence of surfaces.

9 pages, 6 figures

References in corpus (6)

• High-temperature superconductivity in iron-based materials
• Type-1.5 Superconductors
• Ginzburg-Landau theory of vortices in a multi-gap superconductor
• Conditions for non-monotonic vortex interaction in two-band superconductors
• Checkerboard order in vortex cores from pair-density-wave superconductivity
• Vortex chains due to nonpairwise interactions and field-induced phase transitions between states with different broken symmetry in superconductors with competing order parameters

Cited by in corpus (7)

• Evolution of multi-gap superconductivity in the atomically thin limit: Strain-enhanced three-gap superconductivity in monolayer MgB${}_2$
• Paramagnetic Meissner effect in ZrB12 single crystal with non-monotonic vortex-vortex interactions
• Type-II Superconductivity below 4K in Sn0.4Sb0.6
• Current-induced self-organisation of mixed superconducting states
• Anisotropic Superconductors Between Types I and II
• The Type-II/Type-I Crossover in Dirty Ferromagnetic Superconductors
• Interaction-induced chiral-transport inversion