The mixed state response of disordered magnesium diboride has a con-spicous absence of the usual flux-density (B) dependent broadening of conductance-temperature and voltage-current curves. This B independence implies a vortex viscosity that rises linearly with B. We show that this this anomalous viscosity function can arise from the quasiparticle sea of the quenched weaker band and the unusually long electric field penetration depth that delocalizes the vortex electric fields.
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Knight, J.M., Kunchur, M.N. (2008). High-Field Flux Dynamics In Disordered Two-Band Superconductivity. In: Bonča, J., Kruchinin, S. (eds) Electron Transport in Nanosystems. NATO Science for Peace and Security Series B: Physics and Biophysics. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-9146-9_7
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