The Josephson current-phase relations in d-wave/d-wave superconductor junctions in the tunnel limit are studied using the two-dimensional t-J model. The order parameters are determined in a self-consistent way within the Gutzwiller approximation and the Bogoliubov-de Gennes theory. We find that the anomalous current-phase relation in (110) junctions obtained within a quasiclassical theory is qualitatively reproduced with microscopic model calculations. Our method can be applied to grain boundary junctions in which the atomic scale roughness should be taken into account.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering