Critical state structure in low-dimensional superconductors

Abstract

The description of the recent results on the critical-state structure in low-dimensional superconductors (thin film or single-crystalline sample with a high demagnetization factor) is given. The generalized approach taking into account the nonlocality effect as well as the presence of both edge and bulk pinning is formulated. The direct solution of the Maxwell-London integral equation allows to describe both conventional, i.e. a bulk-pinning controlled—and essentially novel, i.e. an edge-pinning controlled critical state structures.