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池田 侑典*; 松村 大樹; 辻 卓也; 生井 飛鳥*; 井元 健太*; 所 裕子*; 中林 耕二*; 大越 慎一*
Inorganica Chimica Acta, 550, p.121434_1 - 121434_8, 2023/03
被引用回数:0 パーセンタイル:0.01(Chemistry, Inorganic & Nuclear)A film of a cyanido-bridged Cu-Mo assembly Cu[Mo(CN)]8HO (CuMo-film) was electrochemically synthesized. Unlike analogs with a formula of M[Mo(CN)]zHO (M = Mn, Fe, Co), which show tetragonal crystal structures, the CuMo-film shows a monoclinic structure in the C2/m space group with cell parameters of a = 17.2461 = 125.1089, and V = 1774.44 . Extended X-ray absorption fine structure analysis traced the bond distances around the Cu site as 1.93-2.30 for Cu-N and 2.01-2.40 for Cu-O. CuMo-film exhibits photo-switchable magnetization with T = 18 K and dielectric relaxation related to the hydrogen bond network. The change of activation energy (E) of the dielectric relaxation around 157 K (from E = 49.9 kJ mol to E = 27.3 kJ mol on cooling) suggests that the development of the hydrogen bond network occurs below 157 K.
小林 啓介*; 田口 宗孝*; 小畠 雅明; 田中 健司*; 所 裕子*; 大門 寛*; 岡根 哲夫; 山上 浩志; 池永 英司*; 大越 慎一*
Physical Review B, 95(8), p.085133_1 - 085133_7, 2017/02
被引用回数:15 パーセンタイル:56.08(Materials Science, Multidisciplinary)We have conducted hard X-ray photoelectron spectroscopy investigations of the electronic structure changes and electron correlation phenomena which take place upon the photoinduced reversible phase transition between - and -TiO. From valence band spectra of - and -TiO, we have identified the bipolaron caused by the -type bonding of orbitals in -TiO and the stacking between the orbitals between different Ti sites in -TiO, previously predicted by calculations. On the other hand, the Ti and Ti core level spectra exhibit nonlocal screening satellite features, which are typical spectroscopic signs of strong electron correlation in the coherent Ti states. Correlation in the valence band also manifests to reduce the plasmon energy, which results in an enhancement of the valence electron mass by a factor of 2.7.