Publications  (after 1992)
Last updated on June 30, 2023

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• Electron Correlation in Ta 5d band of Ta2NiSe5 Deduced from Ta 4f Core-Level Photoemission Analysis
  Kozo Okada
  J. Phys. Soc. Jpn. {\bf 92} 074709 (2023)
  https://doi.org/10.7566/JPSJ.92.074709


• Hund's Coupling Effects on Core Level Photoemission in VO2
  Kozo Okada, Yurika Takeuchi
  J. Phys. Soc. Jpn. {\bf 90} 114707 (2021)
  https://doi.org/10.7566/JPSJ.90.114707


• Theory of Core Level Photoemission in Uranium Intermetallic Compounds Combined with Bayesian Data Analysis Approach
  Kozo Okada, Rikuto Fukuma
  J. Phys. Soc. Jpn. {\bf 90} 094709 (2021)
  https://doi.org/10.7566/JPSJ.90.094709


• Metallic Ground State of Nd$_2$CuO$_4$ Searched by Exact Diagonalization Calculations
  Kozo Okada
  JPS Conf. Proc.30, 011069 (2020)
  https://doi.org/10.7566/JPSCP.30.011069


• Charge Ordering in Ladder Vanadate NaV2O5 Evidenced by Core-level Photoemission
  Kozo Okada
  J. Phys. Soc. Jpn. 87, 104705 (2018)
  https://doi.org/10.7566/JPSJ.87.104705


• Nonlocal Screening Effects on the Ni 2p Core Level Photoemission of the Linear-Chain Nickelate Y2BaNiO5
  Kozo Okada and Yurika Takeuchi
  J. Phys. Soc. Jpn., Vol.86, No.6, Article ID: 064701 (2017)
  https://doi.org/10.7566/JPSJ.86.064701


• Resonant Inelastic X-ray Scattering at the Ti K Absorption Edge of SrTiO₃
  Kozo Okada, Kosuke Takahashi
  J. Phys. Soc. Jpn., Vol.85, No.4, Article ID: 044702 (2016)
  DOI: 10.7566/JPSJ.85.044702


• Anisotropic charge-transfer effects in the asymmetric Fe(CN)₅NO octahedron of sodium nitroprusside: a soft X-ray absorption spectroscopy study
  Nanba, Y ; Asakura, D ; Okubo, M ; Zhou, HS ; Amemiya, K ; Okada, K ; Glans, PA ; Jenkins, CA ; Arenholz, E ; Guo, JH
  PHYSICAL CHEMISTRY CHEMICAL PHYSICS {\bf 16}, 7031-7036 (2014)
  


• Electronic Structures of CeM₂Al₁₀ (M = Fe, Ru, and Os) Studied by Soft X-ray Resonant and High-Resolution Photoemission Spectroscopies
  Ishiga, T ; Wakita, T ; Yoshida, R ; Okazaki, H ; Tsubota, K ; Sunagawa, M ; Uenaka, K ; Okada, K ; Kumigashira, H ; Oshima, M ; Yutani, K ; Muro, Y ; Takabatake, T ; Muraoka, Y ; Yokoya, T
  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 83, 094717 (2014)


• Distinguishing between High- and Low-Spin States for Divalent Mn in Mn-Based Prussian Blue Analogue by High-Resolution Soft X-ray Emission Spectroscopy
  Asakura, D ; Nanba, Y ; Okubo, M ; Mizuno, Y ; Niwa, H ; Oshima, M ; Zhou, HS ; Okada, K ; Harada, Y
  JOURNAL OF PHYSICAL CHEMISTRY LETTERS {\bf 5} 4008-4013 (2014)
  


• Zhang-Rice Singlet Band Dispersion in LiCu2O2 by Cluster Perturbation Calculation
  Kanta Uenaka and Kozo Okada
  J. Phys. Soc. Jpn. 83 (2014) 075003 (2 pages)


• Soft X-ray Photoemission Study of New BiS₂-Layered Superconductor LaO_1−xF_xBiS₂
  Shinsuke Nagira, Junki Sonoyama, Takanori Wakita, Masanori Sunagawa, Yudai Izumi, Takayuki Muro, Hiroshi Kumigashira, Masaharu Oshima, Keita Deguchi, Hiroyuki Okazaki, Yoshihiko Takano, Osuke Miura, Yoshikazu Mizuguchi, Katsuhiro Suzuki, Hidetomo Usui, Kazuhiko Kuroki, Kozo Okada, Yuji Muraoka, and Takayoshi Yokoya
  J. Phys. Soc. Jpn. 83 No.3 (2014) 033703 (5 Pages)


• Intrinsic correlated electronic structure of CrO₂ revealed by hard x-ray photoemission spectroscopy
  Sperlich, M. and K\"onig, C. and G\"untherodt, G. and Sekiyama, A. and Funabashi, G. and Tsunekawa, M. and Imada, S. and Shigemoto, A. and Okada, K. and Higashiya, A. and Yabashi, M. and Tamasaku, K. and Ishikawa, T. and Renken, V. and Allmers, T. and Donath, M. and Suga, S.
  Phys. Rev. B {\bf 76}, 235138 (2013).


• Sm 4f Electronic State of Heavy Fermion Compound SmOs₄Sb₁₂ by Theory of High-Energy Spectroscopy
  Yusuke Nanba, Masaichiro Mizumaki, and Kozo Okada
  J. Phys. Soc. Jpn., Vol.82, No.10, p.104712 (2013)


• Observation of πbackbonding features appearing in Fe 2p X-ray absorption spectra and Fe 1s-4p-1s resonant X-ray emission spectra of RbMn[Fe(CN)₆]
  Yoshinori Kitajima, Ysuke Nanba, Masayuki Tanaka, Yuji Koga, Akihiro Ueno, Kosuke Nakagawa, Hiroko Tokoro, Shin-ichi Ohkoshi, Toshiaki Iwazumi, Kozo Okada,and Yasuhito Isozumi
  Journal of Physics: Conference Series {\bf 430} (2013) 012082


• Enhancement of dielectric constant of BaTiO₃ nanoparticles studied by resonant x-ray emission spectroscopy
  N. Nakajima, M. Oki, Y. Isohama, H. Maruyama. Y. Tezuka, K. Ishiji, T. Iwazumi, and Kozo Okada
  Phys. Rev. B {\bf 86} (2012) 224114/1-4


• Configuration-Interaction Full-Multiplet Calculation to Analyze the Electronic Structure of a Cyano-Bridged Coordination Polymer Electrode
  Y. Nanba, D. Asakura, M. Okubo, Y. Mizuno, T. Kudo, H. Zhou, K. Amemiya, J. Guo, and K. Okada
  J. Phys. Chem. C {\bf. 116} (2012) pp. 24896 - 24901


• Theory of Fe and Mn 2p X-ray absorption for RbMn[Fe(CN)₆]
  Y. Nanba and K. Okada
  J. Electron Spectroscopy and Related Phenom. {\bf 185} (2012) 167-174.


• Tendency toward Element-Selective Mott Transition in A-Site-Ordered Perovskite Compounds, ACu₃V₄O₁₂,(A=Na, Ca, and Y)
  Kozo Okada
  J. Phys. Soc. Jpn. {\bf 81} No.8 (2012) 085004


• Charge Transfer Effects on Fe 2p X-ray Photoemission of RbMn[Fe(CN)₆], K₃Fe(CN)₆, and K₄Fe(CN)₆
  Y. Nanba and K. Okada
  J. Phys. Soc. Jpn. {\bf 80} (2011) 074710/1-6.


• Competition between Backbonding and Electron Correlation in Fe Cyanides
  Y. Nanba and K. Okada
  J. Phys. Soc. Jpn. {\bf 79} (2010) 114722/1-6.


• Theoretical Study of XAS and XMCD Spectra for the Field-Induced Valence Transition in Eu Compounds
  M. Oko, \KO, I. Harada, K. Akabli, and H. T. Diep
  J. Phys. Soc. Jpn. {\bf 79} (2010) 024713/1-7.


• 8 keV photoemission of metal-insulator transition system VO₂
  S. Suga, A. Sekiyama, S. Imada, T. Miyamachi, H. Fujiwara, A. Yamasaki, K. Yoshimura, K. Okada, M. Yabashi, K. Tamasaku, A. Higashiya and T. Ishikawa
  New J. Phys. {\bf11} (2009) 103015 (12pp).


• Electronic Structure of Nd_2-xCe_xCuO₄ and La_2-xSr_xCuO₄ Deduced from Cu 2p Photoemission and Photoabsorption
  Kozo Okada
  J. Phys. Soc. Jpn. {\bf 78}, (2009) 034725 /1-6.


• Electronic Structure of Noncentrosymmetric Superconductor Li$_2$(Pd$_x$Pt$_{1-x}$)$_3$B Studied by Photoemission Spectroscopy
  R. Yoshida, H. Okazaki, M. Tajima, T. Muro, I. Hase, K. Okada, H. Takeya, K. Hirata, M. Hirai, Y. Muraoka, and T. Yokoya
  J. Phys. Soc. Jpn. {\bf 77}, (2008) 104701 /1-5.


• Significance of the inter-site Coulomb interaction between the O 2p and Cu 3d holes revealed by resonant inelastic x-ray scattering of Sr$_{14}$Cu$_{24}$O$_{41}$
  A. Higashiya, S. Imada, T. Murakawa, H. Fujiwara, S. Kasai, A. Sekiyama, S. Suga, \KO, M. Yabashi, K. Tamasaku, T. Ishikawa and H. Eisaki
  New. J. Phys. {\bf 10} (2008) 053033 /1-10.


• Cu K\alpha Resonant X-Ray Emission Spectroscopy in La₂CuO₄
  A. Kotani, K. Okada, M. Calandra, and A. Shukla
  AIP Conf. Proc. 882, 99 (2007).
  
  
• Momentum-Specified Oxygen K Resonant Inelastic X-ray Scattering for Cuprates
  K. Okada and A. Kotani
  J. Phys. Soc. Jpn. 76, No.13 (2007) 123706 /1-4.
  
  
• Resonant Inelastic X-Ray Scattering at the Oxygen K Resonance of NiO:Nonlocal Charge Transfer and Double-Singlet Excitations
  L.-C. Duda, T. Schmitt, M. Magnuson, J. Forsberg, A. Olsson, J. Nordgren, K. Okada and A. Kotani
  Phys. Rev. Lett. 96 (2006) 067402/1-4.
  
  
• Duda et al. Reply:
  L.-C. Duda, T. Schmitt, M. Magnuson, J. Forsberg, A. Olsson, J. Nordgren, K. Okada, and A. Kotani
  Phys. Rev. Lett. 97, (2006) 269702.
  
  
• Copper K and Oxygen K Resonant Inelastic X-ray Scattering of One-Dimensional Cuprates
  K. Okada and A. Kotani
  J. Phys. Soc. Jpn. 75, No.4 (2006) 044702/1-8.
  
  
• Oxygen 1s Core-Level Photoemission as a Tool to Investigate the Unoccupied Electronic States of Cuprates
  K. Okada and Akio Kotani
  J. Phys. Soc. Jpn. 75, No.12 (2006) 123703 /1-3.
  
  
• X-ray spectroscopy study on the electronic structure of hole-doped edge-shared chains in Ca_2+xY_2−xCu₅O₁₀
  E. Kabasawa, J. Nakamura, T. Morimoto, N. Yamada, K. Kuroki, H. Yamazaki, K. Okada, K. Oka, Y. Tezuka, J. D. Denlinger and R. C. C. Perera
  J. Electron Spectrosc. Relat. Phenom. 148 (2005) 65-72.
  
  
• Large-cluster-model calculation of O 1s XAS for Y_2−xCa_xBaNiO₅
  K. Okada
  J. Electron Spectrosc. Relat. Phenom. 144-147 (2005) 1209-1213
  
  
• Localized Nature of Valence-Hole States in Ca_2+xY_2-xCu₅O₁₀ Shown by O 1s XAS
  K. Okada
  Physica Scripta T115 (2005) 182-184.
  
  
• Carrier Doping Effects on Copper 2p Core Level Photoemission in Cuprates
  K. Okada and A. Kotani
  J. Phys. Soc. Jpn. 74 No.2. (2005) 653-660.
  
  
• Effects of Hund's Coupling on Oxygen 1s X-ray Absorption and Resonant X-ray Emission in One-Dimensional Nickelates
  K. Okada
  J. Phys. Soc. Jpn. 73 No.7. (2004) 1681-1684.
  
  
• Theory of Core-Level Resonant X-ray Emission Spectroscopy in Cuprates
  K. Okada and A. Kotani
  J. Electron Spectrosc. Relat. Phenom. 136 (2004) 173-177
  
  
• Theory of Oxygen 1s Resonant X-ray Emission in Edge-Share-Type Quasi-One-Dimensional Cuprates
  Kozo Okada and Akio Kotani
  J. Phys. Soc. Jpn.  72 No.4. (2003)
  
  
• Specification of Zhang-Rice singlet excitation in Sr₂CuO₂Cl₂ mediated by O 1s core hole; Symmetry-selective resonant soft X-ray Raman scattering study
  Y. Harada, K. Okada, A. Kotani, H. Takagi and S. Shin
  Phys. Rev. B 66 (2002) 165104.
  
  
• Angle-Resolved Photoemission Study of the MX-Chain Compound [Ni(chxn)₂Br]Br₂:
  Spin-Charge Separation in Hybridized d-p Chains
  S. Fujimori, A. Ino, T. Okane, A. Fujimori, K. Okada, T. Manabe, M. Yamashita, H. Kishida and H. Okamoto
  Phys. Rev. Lett. 88 (2002) 247601-4.
  
  
• Many-Body Effects on the Core-Level Photoemission in Sr₂RuO₄
  Kozo Okada
  Surface Review and Letters 9 No.1& 2 (2002) p.1023-1028
  
  
• Copper-related information from the oxygen 1s resonant x-ray emission in low-dimensional cuprates
  Kozo Okada and Akio Kotani
  Phys. Rev. B 65 (2002) 144530/1-7
  
  
• Comment on "Atomic Many-Body Effects for the p-Shell Photoelectron Spectra of Transition Metals"
  M. Taguchi, T. Uozumi, K. Okada, H. Ogasawara and A. Kotani
  Phys. Rev. Lett. 86 (2001) p.3692.
  
  
• Theory of oxygen 1s resonant X-ray emission spectroscopy in copper-based oxides 
  Kozo Okada and Akio Kotani
  J. Synchrotron. Radiation  8, Part 2, (2001) p.243-245.
  
  
• Zhang-Rice Singlet State Formation by Oxygen 1s Resonant X-ray Emission in Edge-Sharing Copper-Oxide Systems

K. Okada and A. Kotani
Phys. Rev. B  63 (2001) p.045103 - 1-4
 
• 強相関電子系の内殻励起

岡田耕三
「新しい放射光の科学」（編：菅野暁，藤森淳，吉田博，講談社サイエンティフィク, 2000）, p.62-79.
 
• Resonant x-ray emission spectroscopy in Hubbard model

K. Okada and A. Kotani
J. Phys. Soc. Jpn. 69 No.9 (2000) 3100-3106.
 
• Large-cluster effects on core-level photoabsorption spectrum of LaCuO₃

K. Okada and A. Kotani
J. Phys. Soc. Jpn. 68 (1999) 666-673.
 
• Multiplet splitting effects on core-level photoemission and inverse-photoemission spectra of uranium intermetallic compounds

K. Okada
J. Phys. Soc. Jpn. 68 No.3 (1999) 752-755.
 
• In situ XPS analysis of various iron oxide films grown by NO₂-assisited molecular-beam epitaxy

T. Fujii, F. M. de Groot, G. A. Sawatzky, F. C. Voogt, T. Hibma and K. Okada .
Phys. Rev. B 59 No.4 (1999) 3195-3202.
 
• Large-cluster-model analysis of Cu 2p X-ray absorption spectrum of LaCuO₃

K. Okada and A. Kotani
J. Electron Spectrosc. Relat. Phenom. 101-103 (1999) 757-760.
 
• Magnetic circular X-ray dichroism spectra at L_2,3 edges  of rare-earth compounds

H. Matsuyama, K. Fukui, K. Okada, I. Harada and A. Kotani
J. Electron Spectrosc. Relat. Phenom.  92 (1998) 31-34.
 
• Large-cluster effects on core-level photoemission spectra of quasi-one-dimensional copper compounds

K. Okada and A. Kotani
J. Electron Spectrosc. Relat. Phenom.  88 (1998) 255-260.
 
• Intersite Coulomb Interactions in Quasi-One-Dimensional Copper Oxides

K. Okada and A. Kotani
J. Phys. Soc. Jpn. 66 (1997) No.2, page 341-344.
 
• Intersite screening effects in core-level spectra of low-dimensional copper compounds

K. Okada and A. Kotani
Physica B. 237-238 (1997) 383-384.
 
• Core-level photoemission spectra of low-dimensional copper-oxide systems

K. Okada and A. Kotani
J. Electron Spectrosc. Relat. Phenom. 86 (1997) 119-126.
 
• Ti 2p and resonant 3d photoemission spectra of Ti₂O₃

T. Uozumi, K. Okada, A. Kotani, Y. Tezuka and S. Shin
J. Phys. Soc. Jpn. 65 No.5 (1996) 1150-1153.
 
• Cu 2p core-level photoemission spectrum of Sr₂CuO₃

K. Okada, A. Kotani, K. Maiti and D. D.Sarma
J. Phys. Soc. Jpn. 65 (1996) No.6, page 1844-1848.
 
• Theory of photoemission spectra for M₂O₃ (M=Ti, V, Cr, Mn, Fe) compounds

T. Uozumi, K. Okada and A. Kotani
J. Electron Spectrosc. Relat. Phenom. 78 (1996) 103-106.
 
• Theory of the 4d\rightarrow 2p and 4f \rightarrow 4d x-ray emission spectroscopies in rare-earth compounds

S. Tanaka, H. Ogasawara, K. Okada and A. Kotani
J. Electron Spectrosc. Relat. Phenom. 78 (1996) 199-202.
 
• Multiple-Cu-site effects on core-level photoemission spectra for CuO₂ planar systems

K. Okada and A. Kotani
J. Electron Spectrosc. Relat. Phenom. 78 (1996) 53-56.
 
• Theory of many-body effects in valence, core-level and isochromat spectroscopies along the 3d transition metal seriesof oxides

J. C. Parlebas, M. A. Khan, T. Uozumi, K. Okada and A. Kotani
J. Electron Spectrosc. Relat. Phenom. 71 (1995) 117-139.
 
• Effects of Configuration-Dependent Hybridization on Core-Level Photoemission Spectra

K. Okada and A. Kotani
J. Electron Spectrosc. Relat. Phenom. 71 (1995) R1-R6
 
• Theory of the 4d \rightarrow 2p X-ray Emission Spectroscopy in Ce₂O₃, Pr₂O₃ and Dy₂O₃.

S. Tanaka, H. Ogasawara, K. Okada and A. Kotani
J. Phys. Soc. Jpn. 64 No.6 (1995) 2225-2232.
 
• Nonlocal screening effects on core-level photoemission spectra investigated by large cluster models

K. Okada and A. Kotani
Phys. Rev. B 52 No.7 (1995) 4794-4800.
 
• Core-Level Spectroscopy in Early-Transition-Metal Compounds

A. Kotani, T. Uozumi, K. Okada and J. C. Parlebas
in Spectroscopy of Mott Insulators and Correlated Metals, Eds.:A. Fujimori and Y. Tokura (Springer Series in Solid-State Sciences , Vol. 119, Springer-Verlag 1995) pp.139-149.
 
• Photoemission from Cr 2p and 3s levels of CrF₂

K. Okada, A. Kotani, V. Kinsinger, R. Zimmermann and S. H\"ufner
J. Phys. Soc. Jpn. 63 (1994) 2410-2415.
 
• Resonant X-ray emission spectroscopy in Dy compounds

S. Tanaka, K. Okada and A. Kotani
J. Phys. Soc. Jpn. 63 (1994) No.7 pp.2780-2787.
 
• Split-Off State Formation in the Final State of Photoemission

in Ti Compounds K. Okada, T. Uozumi and A. Kotani
J. Phys. Soc. Jpn. 63 (1994) No.8 pp.3176-3184.
 
• Auger decay of quasiparticle states: Calculation of Ni 3p photoemission spectrum in NiCl₂

K. Okada, A. Kotani, H. Ogasawara, Y. Seino and B. T. Thole
Phys. Rev. B 47 (15 March 1993) No. 11, pp.6203-6206.
 
• Theory of core-level X-ray photoemission and photoabsorption in Ti compounds

K. Okada and A. Kotani
J. Electron Spectrosc. Relat. Phenom. 62 (1993) pp.131-140.
 
• Core-Level Spectroscopy in Transition Metal Compounds

A. Kotani and K. Okada
in Recent Advances in Magnetism of Transition Metal Compounds , (ed. by A. Kotani and N. Suzuki, World Scientific Publishing Co., Singapore 1993), pp.12-25.
 
• Charge-Transfer Satellites in Ti 2p XAS and XPS of Ti Compounds

K. Okada, T. Uozumi and A. Kotani
Jpn. J. Appl. Phys. 32 (1993) Suppl. 32-2, pp.113-115.
 
• Theory of Dysprosium L₃ XANES free from L₃ core lifetime broadening

S. Tanaka, H. Ogasawara, K. Okada and A. Kotani
Jpn. J. Appl. Phys. 32 (1993) Suppl. 32-2, pp.101-103.
 
• Comparison between BIS and Ti K-XAS for TiO₂: Experimental and Theoretical Study

E. Beaurepaire, S. Lewonczuk, J. Ringeissen, J. C. Parlebas, T. Uozumi, K. Okada and A. Kotani
Europhys. Lett. 22 No.6 (1993) pp.463-467.
 
• Electronic Structures of Ti and V Oxides: Calculation of Valence Band Photoemission and Bremsstrahlung Isochromat Spectra

T. Uozumi, K. Okada and A. Kotani
J. Phys. Soc. Jpn. 62 No.8 (1993) pp.2595-2599.
 
• Triple-Peak Feature of the Cu 2p X-ray Photoemission Spectrum in Copper Acetylacetonate

K. Okada, J. Kawai and A. Kotani
Phys. Rev. B 48 No.15 (1993) pp. 10733-10738.
 
• Complementary roles of Co 2p X-ray absorption and photoemission spectra in CoO

K. Okada, and A. Kotani
J. Phys. Soc. Jpn. 61 No.2 (1992) pp.445-453.
 
• Experimental and theoretical investigation of the pre-peaks at the Ti K-edge absorption spectra in TiO₂

T. Uozumi, K. Okada, A. Kotani, O. Durmeyer, J. P. Kappler, E. Beaurepaire and J. C. Parlebas
Europhys. Lett. 18 No.1 (1992) pp.85-90.
 
• Charge Transfer Satellites and Multiplet Splitting in X-ray Photoemission Spectra of Late Transition Metal Halides

K. Okada, A. Kotani and B. T. Thole
J. Electron Spectrosc. Relat. Phenom. 58 (1992) pp.325-343.
 
• Evidence of local singlet state in NaCuO₂ from Cu 2p X-ray photoemssion and photoabsorption spectra

K. Okada and A. Kotani
in The Physics and Chemistry of Oxide Superconductors , (editors: Y. Iye and H. Yasuoka, Springer Proceedings in Physics, Vol.60, Springer-Verlag, Berlin, Heidelberg 1992) pp.157-159.
 
• Interatomic and intra-atomic configuration interactions in core-level X-ray photoemission spectra of late transition metal compounds

K. Okada, and A. Kotani
J. Phys. Soc. Jpn. 61 (1992) No.12, pp.4619-4637.
 
 
 

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