The motion of flux lines in type II superconductors

TLDR

The friction force on a flux line in type II superconductors is examined, especially in light of Bardeen and Stephen's recent work. The study investigates the detailed motion of a flux line in a clean extreme type II superconductor at zero temperature. The authors compare various theoretical forms of the force acting on the flux line with experimental data. The vortex core experiences a Magnus force identical to that in liquid helium, which balances the lattice friction force.

Abstract

Abstract The motion of a flux line in a clean superconductor of extreme type II (λ≫ζ) at zero temperature is discussed in detail. It is shown that the vortex core is subject to a Magnus force identical to that found in liquid helium. The Magnus force balances the friction force exerted by the lattice on the core. The nature of this friction force is discussed, particularly in the light of a recent paper by Bardeen and Stephen. Different possible forms of the force are discussed and compared with experiment.