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Dynamic Pair-Breaking Current, Critical Superfluid Velocity, And Nonlinear Electromagnetic Response Of Nonequilibrium Superconductors, Ahmad Sheikhzada, Alex Gurevich
Dynamic Pair-Breaking Current, Critical Superfluid Velocity, And Nonlinear Electromagnetic Response Of Nonequilibrium Superconductors, Ahmad Sheikhzada, Alex Gurevich
Physics Faculty Publications
We report numerical calculations of a dynamic pair-breaking current density Jd and a critical superfluid velocity vd in a nonequilibrium superconductor carrying a uniform, large-amplitude AC current density J(t)=JasinΩt with Ω well below the gap frequency Ω ≪ Δ0/h. The dependencies Jd(Ω,T) and vd(Ω,T) near the critical temperature Tcwere calculated from either the full time-dependent nonequilibrium equations for a dirty s-wave superconductor or the time-dependent Ginzburg-Landau (TDGL) equations for a gapped superconductor, taking into account the GL relaxation time of the order parameter GL …