title: Studies of the g factors and zero-field splitting for the trigonal Ti(2+)(Ga)-S(p) defect center in GaP crystal.
abstract: The EPR g factors g(parallel), g(perpendicular) and zero-field splitting D suggested to be caused by a donor-acceptor nearest-neighbour pair defect [Ti(Ga)(2+)-Sp] in GaP:Ti(2+) co-doped with sulphur are calculated from the high-order perturbation formulas based on a two spin-orbit coupling parameter model for the EPR parameters of 3d(2) ion in trigonal symmetry. The calculated results are close to the observed values. The suggestion of [Ti(Ga)(2+)-Sp] pair defect in GaP:Ti co-doped with sulphur is also confirmed from this calculation.
authors.affiliation: Department of Material Science, Sichuan University, Chengdu 610064, PR China. zhengwenchen@netease.com
authors.forename: Zheng
authors.initials: Z
authors.lastname: Wen-Chen
authors.forename: Wu
authors.initials: W
authors.lastname: Shao-Yi
authors.forename: Zi
authors.initials: Z
authors.lastname: Jian
mesh_terms: D016880:Anisotropy; D002621:Chemistry / Q000379:methods; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D007477:Ions; D008024:Ligands; D008956:Models, Chemical; D015233:Models, Statistical; D014025:Titanium / Q000737:chemistry*
chemical_list: D007477:Ions; D008024:Ligands; D014025:Titanium