Abstract
In order to investigate effects of twin boundary (TB) on structure of spontaneous half-quantized vortices (SHQVs) in a nano-scaled composite structure that is consisted of d- and s-wave superconductors (d-dot), we investigate magnetic field distribution with a d-dot model which has a single TB using anisotropic two-component Ginzburg-Landau equations and finite element method. We find that fractional vortices appear at the edges of TB and that the fractional vortices merge with SHQVs when effective interaction between d- and s-wave SCs is small.
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