SUPERCONDUCTIVITY IN RESTRICTED GEOMETRIES

Some aspects of superconductivity in restricted geometries are reviewe d. In particular, the suppression of the critical temperature and the order parameter in homogeneously disordered thin films, on the basis o f a systematic, self-consistent (one-loop) approximation, is discussed . Furthermore, theoretical results for persistent currents (nonlinear magnetic response in equilibrium) in mesoscopic rings, as well as poss ible experimental scenarios, are described.