Thermodynamic Behavior of Type-II Superconductors with Small kappa near the Lower Critical Field

Jun 1, 1971
4 pages
Published in:
  • Phys.Rev.B 3 (1971) 3821-3825

Citations per year

19781990200220142024102
Abstract: (APS)
The interaction between well-separated Abrikosov vortices is calculated with the Ginzburg-Landau theory for superconductors with κ<2. For κ>12, vortices repel each other while for κ<12 there is an attraction. Therefore, in the Ginzburg-Landau regime, all type-II superconductors exhibit a λ transition gradually changing into a first-order transition as κ→12. Slightly above Hc1 a transition from the triangular- to the square-flux-line lattice is found to take place. The variational method used admits more general applications.