Anisotropic g factors of the tetragonal Cu2+ monomer in Tl-2223 superconductor

Zhi-Hong Zhang, Shao-Yi Wu, Min-Quan Kuang, Chang-Chun Ding
2015 Low temperature physics (Woodbury, N.Y., Print)  
The gyromagnetic factors of the Cu 2+ monomer in Tl-2223 superconductor are quantitatively investigated from the perturbation formulas of these factors for a 3d 9 ion in a tetragonally elongated octahedron. The local tetragonal distortion of the system is attributable to the axial elongation along c axis, corresponding to the five-fold coordinated Cu 2+ (2) site with almost 30% longer Cu-O bond length for the apical oxygen as compared to the four planar ones. The significant anisotropic
more » ... s of the EPR spectra perpendicular to and parallel with the ab (CuO 2 ) layers are analyzed on the basis of the local tetragonal elongation. PACS: 71.18.+y Fermi surface: calculations and measurements; effective mass, g factor.
doi:10.1063/1.4913755 fatcat:xnwawglxgbci5e4fuiugkavhi4