Finite-Difference Integro-Interpolation Method for Discontinuous Solutions of the Usadel EquationsстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 23 января 2026 г.
Аннотация:The paper considers a one-dimensional problem for elliptic equations with nonstan-dard jump conditions on the internal boundary and a discontinuous solution. The integro-interpolation (balance) method is used to approximate the problem, including the junctionccondition on the inner boundary, which leads, in the case of Robin relations (the jump of the solution is proportional to the flux), to a four-point stencil. This finite-difference scheme is used to solve the system of nonlinear Usadel equations, which is the basic mathematical model at the microlevel for describing currents and fields in superconductors, including those with Josephson junctions. The results of calculations for the Abrikosov vortex problem are presented, and the accuracy of the proposed approach is investigated, in particular, for a simplified three-point scheme.