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Third-order phase transition and superconductivity in thin films

Research paper by Christofer Cronström, Milan Noga

Indexed on: 01 Feb '01Published on: 01 Feb '01Published in: Czechoslovak Journal of Physics



Abstract

We have found a new mean field solution in the BCS theory of superconductivity. This unconventional solution indicates the existence of superconducting phase transitions of third order in thin films, or in bulk matter with a layered structure. The critical temperature increases with decreasing thickness of the layer, and does not exhibit the isotope effect. The electronic specific heat is a continuous function of temperature with a discontinuity in its derivative.