Abstract
We investigated the interaction between two square d-dot’s. The d-dot is the nano-scaled superconducting composite structure that is made of a d-wave superconducting dot embedded in the s-wave superconducting matrix. In the numerical calculation, using the finite element method, we solved the two-components Ginzburg–Landau equation self-consistently. We obtained two kinds of solutions, which can be considered as ferromagnetic and antiferromagnetic configurations, when two d-dot’s are separated parallel and diagonally. Also we discuss the applicability of d-dot’s as an artificial spin system where the interactions can be controlled by the fabrication.
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