Excitation Order Research Team

Our aims are to study the material science and photo property. At the same time, we develop cut-edging spectroscopy of soft X-ray in SPring-8. Because the soft X-ray is the most suitable light for the measurements of electron property, we research many kinds of materials by high resolution photoelectron spectrometry, fluorescent soft X-ray spectrometry and Raman scattering spectrometry. The high resolution photoelectron spectrometry is an efficient method to know the information of electron in a material. When we measure 3d and 4f state of strongly-correlated materials in Fermi surface, we can reveal the mechanism of super conductivity and phase transition of metallic insulator. The fluorescent soft X-ray spectrometry and the Raman scattering spectrometry are a method to know local state density of materials. We research electron state of hyper-complex materials like liquid and biological materials, though they have been never researched because there is no way to research.

Research Subjects

• Soft x-ray emission study on the electronic structure of solids, liquids and biomaterials using high energy-resolution soft x-ray emission spectrometer
• Ultrahigh-resolution photoemission study on strongly correlated systems, thin films by pulsed laser deposition(PLD) and solid surfaces
• Soft x-ray diffraction using highly coherent X-ray beam

Publications

1. Y. Tanaka , N Terada, T.Nakajima,M Taguchi, T. Kojima , Y. Takata,S. Mitsuda, M. Oura, Y. Senba ,H. Ohashi , S. Shin:
   "Incommensurate Orbital Modulation behind Ferroelectricity in CuFeO2."
   Phys.Rev.Lett.109, 127205 (2012)
2. K. Okazaki, Y. Ota, Y. Kotani, W. Malaeb, Y. Ishida,T. Shimojima, T. Kiss, S. Watanabe, C.-T. Chen, K. Kihou,C. H. Lee, A. Iyo, H. Eisaki, T. Saito, H. Fukazawa,Y. Kohori,K. Hashimoto, T. Shibauchi, Y. Matsuda, H. Ikeda,H. Miyahara, R. Arita, A. Chainani, S.Shin:
   "Octet-line node structure of superconducting order parameter in KFe2As2"
   Science 337, 1314 (2012)
3. Y. W. Long, Y. Kaneko, S. Ishiwata, Y. Tokunaga, T. Matsuda, H. Wadati, Y. Tanaka, S.Shin,Y. Tokura, Y. Taguchi:
   "Evolution of magnetic phases in single crystals of SrFe1-xCoxO3 solid solution"
   Phys. Rev.B.86, 064436 (2012)
4. T. Kiss, A. Chainani, H. M. Yamamoto, T. Miyazaki, T. Akimoto, T. Shimojima, K. Ishizaka, S. Watanabe, C.-T. Chen, A. Fukaya, R. Kato and S. Shin:
   "Quasiparticles and Fermi liquid behavior in an organic metal"
   Nature Communications 3, 1089 (2012)
5. M.Matsunami, A.Chainani,M.Taguchi, R.Eguchi,I Y.Takata,M.Oura,M.Yabashi,K.Tamasaku,Y.Nishino,T.Ishikawa,M.Kosaka and S.Shin:
   "Photoemission Evidence for Valence Fluctuations and Kondo Resonance in YbAl2"
   The Physical Society of Japan 81, 073702 (2012)
6. Y.Tanaka, S.P.Collins, S.W.Lovesey, M.Matsunami, T.Moriwaki, S.Shin:
   "Corrigendum: Determination of the absolute chirality of tellurium using resonant diffraction with circularly polarized x-rays"
   Journal of Physics: Condensed Matter., 24, 159501 (2012)
7. J.Braun, J.Minar, H.Ebert, A.Chainani, J.Miyawaki, Y.Takata, M.Taguchi, M.Oura, S.Shin:
   "Correlation effects, circular dichroism, and Fermi surfaces of bulk nickel from soft x-ray angle-resolved photoemission"
   Phys Rev. B., 85, 165105 (1-5) (2012)
8. Y.Horikawa, H.Arai, T.Tokushima, S.Shin:
   "Special fingerprint in x-ray absorption for hydrogen-bonded dimer formation of acentic acids in solution"
   Chem.Phys.Lett., 522, 33-37 (2012)
9. H.Arai, Y.Horikawa, K.Sadakane, T.Tokushima, Y.Harada, Y.Senba, H.Ohashi, Y.Takata, S.Shin:
   "Hydrogen bonding of water in 3-methylpyridine studied by O 1s x-ray emission and absorption spectroscopy"
   Phys.Chem.Chem.Phys., 14, 1576-1580 (2012)
10. T.Tokushima, Y.Horikawa, H.Arai, Y.Harada, O.Takahashi, L.G.M.Pettersson, A.Nilsson, S.Shin:
    "Polarization dependent resonant x-ray emission spectroscopy of D2O and H2O water: Assignment of the local molecular orbital symmetry"
    The Journal of Chemical Physics., 136, 044517 (1-7) (2012)