日本物理学会
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作者:Kozo Okada , Yurika Takeuchi
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2017, Vol.86 (6)JPS
摘要:The Ni 2 p X-ray photoemission spectrum (Ni 2 p XPS) of the linear-chain nickelate Y2BaNiO5 is calculated by a Ni5O26 cluster model, adopting the numerically-exact diagonalization method based on the Lanczos algorithm. Particular a...
作者:Kozo Okada
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2018, Vol.87 (10)JPS
摘要:Core-level X-ray photoelectron spectrum of the ladder vanadate NaV2O5 is calculated with an extended Hubbard model, adopting a numerically exact diagonalization method based on the Lanczos algorithm. The result shows that the d band filling dependence of the...
作者:Kozo Okada , Kosuke Takahashi
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2016, Vol.85 (4)JPS
摘要:The off-centering of the Ti atom in SrTiO3 is discussed by calculating the resonant inelastic X-ray scattering (RIXS) at the Ti K absorption edge. The present TiO6 cluster model calculation shows that the Ti K RIXS is sensitive to the local symmetry at the T...
作者:Kozo Okada , Yasuhiro Seino , Akio Kotani
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 1991, Vol.60 (3), pp.1040-1050JPS
摘要:The role of the Cu 4 s conduction band in the Cu 2 p -XPS (X-ray photoemission spectrum) of Nd2- x Ce x CuO4 is investigated on the basis of both a simple CuO4 cluster model and the impurity Anderson model. The impurity Anderson model c...
作者:Kozo Okada , Akio Kotani ...
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 1996, Vol.65 (6), pp.1844-1848JPS
摘要:We measure the Cu 2 p X-ray photoemission spectrum (XPS) of Sr2CuO3 andanalyze it by means of exact diagonalization calculations for(CunO3 n )4 n - clusters.In Sr2CuO3, the intensity ratio of the 3 ...
作者:Kozo Okada , Akio Kotani
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2003, Vol.72 (4), pp.797-800JPS
摘要:The many-body nature of O 1 s resonant X-ray emission spectroscopy (RXES) in edge-share-type quasi-one-dimensional cuprates with hole doping is discussed on the basis of finite-size cluster model calculations. In the case of hole-doped systems, the line shape of O 1 s RXES s...
作者:Kozo Okada , Akio Kotani
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 1992, Vol.61 (2), pp.449-453JPS
摘要:We investigate the Co 2 p core-level X-ray absorption (XAS) and photoemission spectra (XPS) in CoO on the basis of a CoO6 cluster model, where Co 3 d -O 2 p hybridization and multiplet coupling are fully taken into account. We pay particular attention to the effects of...
作者:Kozo Okada , Takayuki Uozumi , Akio Kotani
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 1994, Vol.63 (8), pp.3176-3184JPS
摘要:We calculate the Ti 3 p and 3 s core-level X-ray photoemission spectra (XPS) of tetravalent Ti compounds, such as TiO2 and SrTiO3. Because of the strong hybridization between the Ti 3d and O 2p orbitals, a small number of states split off in the final state ...
作者:Kozo Okada
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 1999, Vol.68 (3), pp.752-755JPS
摘要:The present paper discusses the role of U 5 f -5 f exchange interaction( J ) in the inverse photoemission spectrum (IPES) and the U 4 f x-rayphotoemission spectrum (XPS) of uranium intermetallic compounds.The origin of the broad main peak in the IPESof UPd3 and UPd...

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