title: The role of the hybridization between Mn 3d and O 2p orbitals in the existence of the Griffiths phase in La0.85Ca0.15MnO3.
abstract: Favourable conditions for the existence of the Griffiths phase in the La0.85Ca0.15MnO3 compound are experimentally investigated in terms of electronic and lattice structure by temperature-dependent x-ray absorption spectroscopy, valence band photoemission spectroscopy, and x-ray diffraction experiments. The chemical shifts of Mn L-edge and O K-edge x-ray absorption lines in the Griffiths phase are understood to be related to the hybridization between Mn 3d and O 2p states instead of the variation of Mn valence states. Valence band spectra also indicate that the hybridization of O 2p with Mn 3d is enhanced in the Griffiths phase. From a 2D diluted Ising ferromagnet model, this hybridization between Mn 3d and O 2p orbitals surely enhances the Griffiths phase feature.
authors.affiliation: Department of Physics, Southeast University, 211189 Nanjing, People's Republic of China.
authors.forename: Hong-guang
authors.initials: HG
authors.lastname: Zhang
authors.forename: Jiang-jian
authors.initials: JJ
authors.lastname: Shi
authors.forename: Yong-tao
authors.initials: YT
authors.lastname: Li
authors.forename: Xue-guang
authors.initials: XG
authors.lastname: Dong
authors.forename: Xiao-peng
authors.initials: XP
authors.lastname: Ge
authors.forename: Hao
authors.initials: H
authors.lastname: Liu
authors.forename: Qing-teng
authors.initials: QT
authors.lastname: Hou
authors.forename: Qi
authors.initials: Q
authors.lastname: Li
authors.forename: Yan-kun
authors.initials: YK
authors.lastname: Tang
mesh_terms: D017610:Calcium Compounds / Q000737:chemistry*; D056831:Coordination Complexes / Q000737:chemistry*; D004583:Electrons; D007811:Lanthanum / Q000737:chemistry*; D017895:Manganese Compounds / Q000737:chemistry*; D008958:Models, Molecular; D010087:Oxides / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D056928:X-Ray Absorption Spectroscopy; D014961:X-Ray Diffraction
chemical_list: D017610:Calcium Compounds; D056831:Coordination Complexes; D017895:Manganese Compounds; D010087:Oxides; C103829:lanthanum oxide; C027424:manganese oxide; D007811:Lanthanum; C016538:lime