The flux flow resistivity in a system with 2 s-wave superconducting gaps was calculated. The result agreed well with an anomalous field dependence of the resistivity which had been observed in the vortex state of MgB2.

Flux Flow Resistivity in the System with Two Superconducting Gaps. J.Goryo, H.Matsukawa: Physica B, 2005, 359-361, 533-5