Viscosity of vortices in pure superconductors
Larkin A.I., Ovchinnikov Yu.N.
The vortex viscosity at low temperatures was obtained for pure superconductors with electron mean free path I satisfying the conditions vTl< <l, veFTc~2. Accurate to a factor 1η(Δ/ Τ), the results correspond to the assumption that there exist normal regions with dimensions on the order of ξ0= v/Tc.