The instability point Hs of the Meissner state for large-κ superconductors

  • Yu. N. Ovchinnikov
Solids Electronic Properties


The critical field Hs corresponding to the emergence of vortices in a superconductor without a threshold is found near the transition temperature and in the limit as T→0 for an arbitrary value of the depairing factor Γ. In superconductors of the second kind, this field value coincides with the absolute instability point of the Meissner state. In large-κ superconductors, the order parameter tends to zero on the surface of the super-conductor if the external magnetic field reaches the value Hs. We obtain that Hs=Hcm (where Hcm is the thermodynamic critical field) for an arbitrary value of the depairing factor Γin the temperature region near Tc and at T=0.


Spectroscopy Magnetic Field Vortex State Physics Transition Temperature 
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© MAIK "Nauka/Interperiodica" 2001

Authors and Affiliations

  • Yu. N. Ovchinnikov
    • 1
    • 2
  1. 1.Centre de Recherches sur les Tres Basses Temperatures, associe a l’UIFCNRSGrenoble-Cedex 9France
  2. 2.Landau Institute for Theoretical PhysicsRussian Academy of SciencesMoscowRussia

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