Vortex motion and flux-flow resistivity in dirty multiband superconductors

Abstract

The conductivity of vortex lattices in multiband superconductors with high concentration of impurities is calculated based on microscopic kinetic theory. Both the limits of high and low fields are considered, when the magnetic induction is close to or much smaller than the critical field strength $H_{c2}$, respectively. It is shown that in contrast to single-band superconductors the resistive properties are not universal but depend on the pairing constants and ratios of diffusivities in different bands. The low-field magneto-resistance can strongly exceed Bardeen-Stephen estimation in a quantitative agreement with experimental data for two-band superconductor MgB${}_2$.

References in corpus (9)

• Very High Field Two-Band Superconductivity in LaFeAsO_0.89F_0.11
• Vortex Imaging in the pi-Band of Magnesium Diboride
• Superfluid density and specific heat within self-consistent scheme for two-band superconductor
• Vortex sub-lattice melting in a two-component superconductor
• Thermodynamically stable noncomposite vortices in mesoscopic two-gap superconductors
• Microwave Response of V3Si Single Crystals: Evidence for Two-Gap Superconductivity
• Dissociation Transition of a Composite Lattice of Magnetic Vortices in the Flux-Flow Regime of Two-Band Superconductors
• Investigation of the Superconducting Gap Structure in SrFe${}_2$(As${}_{0.7}$P${}_{0.3}$)${}_2$ by Magnetic Penetration Depth and Flux Flow Resistivity Analysis
• Exceptional Suppression of Flux-Flow Resistivity in FeSe${}_{0.4}$Te${}_{0.6}$ by Back-Flow from Excess Fe Atoms and Se/Te Substitutions

Cited by in corpus (3)

• Self-consistent calculation of the flux-flow conductivity in diffusive superconductors
• Microwave flux-flow Hall effect in a multi-band superconductor FeSe
• Effect of charge-imbalance potential relaxation on the high-frequency vortex dynamics and kinetic inductance of superconducting circuits