Bogomolnyi-type bounds in unconventional superconductors without external magnetic fields
arXiv:cond-mat/9604119 · doi:10.1016/0038-1098(96)00210-4
Abstract
Following Bogomolnyi's classical treatment of vortices, we develop a method for finding rigorous lower bounds to the Landau-Ginzburg free energy describing unconventional superconductors in the absence of external magnetic fields. This allows a more precise description of the magnetic instabilities previously considered in these systems. In particular, we derive new sufficient conditions for the stability of both the homogeneous and inhomogeneous equilibrium states.
9 pages, Revtex, no figures, submitted to Solid State Communications