Depairing Critical Mass- and Spin-Superflows in Superfluid Fermi Liquids

Abstract

The dependence of the critical velocity and depairing superflow on a1 Landau amplitude (on b1 for spin-superflow) is determined in the framework of weak coupling microscopic approach for superconductors. The superflow instability phenomenon is described for s-paired Fermi liquid and coordinates of the tricritical point, vs. a1 parameter, are determined by application of the bifurcation theorem. The relation to the local limit for superconductors type II upon magnetic field is indicated. The similar considerations for p-paired superfluid Fermi liquid is also contained with relevance to charged p-paired systems. The super flow instability for BW-2D and 2D-normal phase transitions of p-paired systems is described.