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 (24)

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Cited by in corpus (7)

• Flux flow spin Hall effect in type-II superconductors with spin-splitting field
• Pinning properties of FeSeTe thin film through multifrequency measurements of the surface impedance
• Pinning, flux flow resistivity and anisotropy of Fe(Se,Te) thin films from microwave measurements through a bitonal dielectric resonator
• Self-consistent calculation of the flux-flow conductivity in diffusive superconductors
• Microwave flux-flow Hall effect in a multi-band superconductor FeSe
• Universality and unconventional enhancement of flux-flow resistivity in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Effect of charge-imbalance potential relaxation on the high-frequency vortex dynamics and kinetic inductance of superconducting circuits