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Publisher Summary Two papers by Landau have developed a theory of the layer structure of superconductors in the intermediate state. Calculations were for a model in which plane-parallel layers have a thickness constant along their length and are only slightly curved at the surface of the sample. This chapter examines the theory of the layer structure of superconductors in the intermediate state. Near the surface, at a depth of the order of the layer thickness, the magnetic field in the normal layers is below the critical value. This suggested that the model would be thermodynamically unstable and the normal layers would undergo branching. It is certain that such branching must indeed occur when the sample is sufficiently large (length L parallel to the field). On the other hand, when L is sufficiently small (and so is the layer thickness, which decreases along with L), the structure with unbranched layers must remain more favorable from the energy standpoint. |
