Theoretical studies of the anisotropic g factors for deoxygenated Y123

摘要

The anisotropic g factors of the deoxygenated YBaCuO (Y123) are theoretically studied using the perturbation formulas of the g factors for a tetragonally elongated octahedral 3d(9) cluster. The ligand orbital and spin-orbit coupling contributions are included from the cluster approach in view of covalency. The calculated g factors show good agreement with the experimental data. The anisotropy of the g factors is analyzed by considering the local tetragonal elongation distortion around this five-fold coordinated Cu2+ site in the deoxygenated Y123 system.