Observation of magnetic excitations in 5d transition metal oxides by resonant inelastic scattering of synchrotron radiation x-rays

• Project/Area Number: 23740246
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics I
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: ISHII Kenji 独立行政法人日本原子力研究開発機構, 量子ビーム応用研究部門, 研究主幹 (40343933)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: X線散乱 / 非弾性散乱 / 磁気励起 / 強相関電子系 / Ｘ線散乱

Research Abstract

I demonstrated in this research that magnetic excitations in 5d transition metal oxides, focusing on iridium oxides here, can be observed by resonant inelastic scattering using synchrotron radiation x-rays. I introduced new optical devices and achieved the best energy resolution of 70 meV. Using the high-energy resolution, I successfully observed dispersive magnetic excitations in Sr_2_IrO_4 and Sr_3Ir_2O_7 and their temperature dependence, which clarified the effect of two-dimensional magnetic interaction in the materials.

Research Products

• [Journal Article] Instrumental upgrades of the RIXS spectrometer at BL11XU at SPring-8 (2013)
  • Author(s): K. Ishii, I. Jarrige, M. Yoshida, K. Ikeuchi, T. Inami, Y. Murakami, and J. Mizuki
  • Journal Title: Journal of Electron Spectroscopy and Related Phenomena Volume: (accepted and to be published) Pages: 127-132
  • DOI: 10.1016/j.elspec.2012.12.003
  • Peer Reviewed
• [Journal Article] Inelastic x-ray scattering studies of electronic excitations (2013)
  • Author(s): Kenji Ishii, Takami Tohyama, and Jun'ichiro Mizuki
  • Journal Title: Journal Physical Society of Japan Volume: Vol. 82
  • NAID: 210000132384
  • Peer Reviewed
• [Journal Article] Resonant inelast c X-ray scattering study of intra-band charge excitations in hole-doped high-Tc cupra (2013)
  • Author(s): S. Wakimoto, K. Ishii
  • Journal Title: Phys. Rev. B Volume: 87 Issue: 10 Pages: 104511-104511
  • DOI: 10.1103/physrevb.87.104511
  • Peer Reviewed
• [Journal Article] Resonant inelastic x-ray scattering study of charge excitations in superconducting and non-superconducting PrFeAsO1-y (2012)
  • Author(s): I. Jarrige
  • Journal Title: Physical Review B Volume: 86 Issue: 11
  • DOI: 10.1103/physrevb.86.115104
  • Peer Reviewed
• [Journal Article] Electronic excitations around the substituted atom in La_2Cu_<1-y> Ni_yO_4 as seen via resonant inelastic x-ray scattering (2012)
  • Author(s): K. Ishii, K. Tsutsui, K. Ikeuchi, I. Jarrige, J. Mizuki, H. Hiraka, K. Yamada, T. Tohyama, S. Maekawa, Y. Endo, H. Ishii, and Y. Q. Cai
  • Journal Title: Physical Review B Volume: 85 Issue: 10 Pages: 104509-104509
  • DOI: 10.1103/physrevb.85.104509
  • Peer Reviewed
• [Journal Article] Polarization-analyzed resonant inelastic x-ray scattering of the orbital excitations in KCuF_3 (2011)
  • Author(s): Ikeuchi, K. Kuzushita, T. Inami, K. Ohwada, M. Yoshida, I. Jarrige, N. Tatami, S. Niioka, D. Bizen, Y. Ando, J. Mizuki, S. Maekawa, Y. Endoh
  • Journal Title: Phys. Rev. B Volume: Vol.83 Issue: 24 Pages: 1-4
  • DOI: 10.1103/physrevb.83.241101
  • Peer Reviewed
• [Presentation] Symmetry of d-d excitations in inelastic x-ray scattering (2013)
  • Author(s): K. Ishii el al.
  • Organizer: JAEA Synchrotron Radiation Research Symposium "Magnetism in Quantum Beam Science"
  • Place of Presentation: 兵庫県佐用町
  • Year and Date: 2013-03-12
• [Presentation] Recent RIXS results on charge and orbital excitations and their connection to future NIXS (2012)
  • Author(s): K. Ishii
  • Organizer: RIKEN Workshop "High-Resolution Spectroscopy with X-Rays"
  • Place of Presentation: 埼玉県和光市
  • Year and Date: 2012-11-15
• [Presentation] Momentum-resolved electronic excitations probed with resonant inelastic x-ray scattering (2012)
  • Author(s): K. Ishii
  • Organizer: JAEA Symposium on Synchrotron Radiation Research 2012
  • Place of Presentation: 兵庫県佐用町
  • Year and Date: 2012-03-07
• [Presentation] 低エネルギー電子励起観測に向けた共鳴非弾性X線散乱分光器の高度化 (2012)
  • Author(s): 石井賢司, 他
  • Organizer: 第25回日本放射光学会年会放射光科学合同シンポジウム
  • Place of Presentation: 愛知県名古屋市
  • Year and Date: 2012-01-09
• [Presentation] 低エネルギー電子励起観測に向けた共鳴非弾性X線散乱分光器の高度化 (2012)
  • Author(s): 石井賢司
  • Organizer: 第25回日本放射光学会年会放射光科学合同シンポジウム
  • Place of Presentation: 佐賀県鳥栖市
• [Presentation] Electronic excitations probed with resonant inelastic x-ray scattering (2011)
  • Author(s): Kenji Ishii
  • Organizer: 1st Asia-Oceania Conference on Neutron Scattering
  • Place of Presentation: 茨城県つくば市
• [Presentation] Study of the charge dynamics in Sr14-xCaxCu24O41 by resonant inelastic x-ray scattering (2011)
  • Author(s): Masahiro Yoshida
  • Organizer: 1st Asia-Oceania Conference on Neutron Scattering
  • Place of Presentation: 茨城県つくば市
• [Presentation] 共鳴非弾性X線散乱によるSr14-xCaxCu24O41の高圧下電子状態の観測 (2011)
  • Author(s): 吉田雅洋
  • Organizer: 第52回高圧討論会
  • Place of Presentation: 沖縄県西原町
• [Presentation] 励起状態に現れる隠れた電荷相関 (2011)
  • Author(s): 石井賢司
  • Organizer: 金研ワークショップ「電子自由度による強誘電体研究最前線」
  • Place of Presentation: 宮城県仙台市
• [Presentation] 共鳴非弾性X線散乱による(Sr,Ca)14Cu24O41の高圧下での電子励起 (2011)
  • Author(s): 吉田雅洋
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山県富山市
• [Presentation] 共鳴非弾性X線散乱によるLuFe2O4におけるフラストレートした電荷ゆらぎの観測 (2011)
  • Author(s): 石井賢司
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山県富山市
• [Presentation] Polarization-analyzed resonant inelastic x-ray scattering of the orbital excitations in KCuF3 (2011)
  • Author(s): K. Ishii
  • Organizer: Search for new physics in transition metal compounds by spectroscopies (IMR workshop)
  • Place of Presentation: 宮城県仙台市
• [Presentation] Electronic excitations in hard x-ray resonant inelastic scattering (tentative)
  • Author(s): Kenji Ishii
  • Organizer: Light and Particle Beams in Materials Science 2013
  • Place of Presentation: つくば市
  • Invited
• [Presentation] Carrier dynamics in doped high-Tc cupartes studied by Cu K-edge RIXS
  • Author(s): Kenji Ishii
  • Organizer: 8th International Conference on Inelastic X-ray Scattering
  • Place of Presentation: SLAC National Accelerator Laboratory
  • Invited
• [Presentation] Symmetry of d-d excitations in inelastic x-ray scattering
  • Author(s): K. Ishii
  • Organizer: JAEA Synchrotron Radiation Research Symposium "Magnetism in Quantum Beam Science"
  • Place of Presentation: 兵庫県佐用町
• [Presentation] Recent RIXS results on charge and orbital excitations and their connection to future NIXS
  • Author(s): K. Ishii
  • Organizer: RIKEN Workshop "High-Resolution Spectroscopy with X-Rays
  • Place of Presentation: 和光市
• [Presentation] Cu-K吸収端共鳴X線非弾性散乱によるLa2-x(Sr, Ba)xCuO4の電荷励起の研究
  • Author(s): 脇本秀一
  • Organizer: 日本物理学会2012年秋季大会
  • Place of Presentation: 横浜市