Visualization of valence electron density distribution by quadrupole scattering measurement

2012 Fiscal Year Final Research Report

• Project/Area Number: 23654127
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: The Institute of Physical and Chemical Research
• Principal Investigator: OHSUMI Hiroyuki 独立行政法人理化学研究所, 高田構造科学研究室, 専任研究員 (90360825)
• Project Period (FY): 2011 – 2012
• Keywords: X線回折 / 偏光依存性 / 消衰効果 / 多波回折 / 電荷整列 / 軌道整列

Research Abstract

The aim of this study is to detect non-Thomson scattering, which plays a key role in selective measurement of scattered X-rays only from valence electrons, by utilizing polarization properties of synchrotron radiation and improving polarization control/measurement techniques. From the dependence of diffraction intensity on incident X-ray polarization, it has been found that the super-lattice reflection arising from orbital ordering in manganites is attributed to non-Thomson scattering. In addition, it has been demonstrated that the effect of extinction can be independently evaluated for every reflection.

Research Products

• [Journal Article] Tetrahedral Magnetic Order and the Metal-Insulator Transition in the Pyrochlore Lattice of Cd_2Os_2O_7 (2012)
  • Author(s): J. Yamaura, K. Ohgushi, H. Ohsumi, T. Hasegawa, I. Yamauchi, K. Sugimoto, S. Takeshita, A. Tokuda, M. Takata, M. Udagawa, M. Takigawa, H. Harima, T. Arima, and Z. Hiroi
  • Journal Title: Phys. Rev. Lett Volume: 108 Pages: 247205
• [Journal Article] Two-dimensional Heisenberg behavior of J_<eff>=1/2 isospins in the paramagnetic state of spin-orbit Mott insulator Sr_2IrO_4 (2012)
  • Author(s): S. Fujiyama, H. Ohsumi, T. Komesu, J. Matsuno, B. J. Kim, M. Takata, T. Arima, and H. Takagi
  • Journal Title: Phys. Rev. Lett Volume: 108 Pages: 247212
• [Journal Article] Orbital structures in spinel vanadates AV_2O_4 (A=Fe, Mn) (2012)
  • Author(s): Y. Nii, H. Sagayama, T, Arima, S. Aoyagi, R. Sakai, S. Maki, E. Nishibori, H. Sawa, K. Sugimoto, H. Ohsumi, and M. Takata
  • Journal Title: Phys. Rev Volume: B 86 Pages: 125142
• [Journal Article] Weak antiferromagnetism of J_<eff>=1/2 band in bilayer iridate Sr_3Ir_2O_7 (2012)
  • Author(s): S. Fujiyama, K. Ohashi, H. Ohsumi, K. Sugimoto, T. Takayama, T. Komesu, M. Takata, T. Arima, and H. Takagi
  • Journal Title: Phys. Rev Volume: B 86 Pages: 174414
• [Presentation] Magnetic domain imaging in the frustrated all-in/all-out pyrochlore Cd_2Os_2O_7 (2013)
  • Author(s): Samuel Tardif、竹下聡史、大隅寛幸、山浦淳一、有馬孝尚
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島
  • Year and Date: 2013-03-29
• [Presentation] Pr_<0.5>Ca_<0.5>MnO_3/La_<0.5>Sr_<0.5>MnO_3超格子薄膜における電荷秩序ドメインと電気伝導 (2013)
  • Author(s): 竹下聡史、大隅寛幸、Samuel Tardif、有馬孝尚、高田昌樹、中村優男、久保田将司、川崎雅司、十倉好紀、湯本博勝、小山貴久、大橋治彦
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島
  • Year and Date: 2013-03-27
• [Presentation] 放射光によるカイラリティドメインの可視化 (2012)
  • Author(s): 大隅寛幸
  • Organizer: 第3回「カイラル磁性体―起源と機能―」
  • Place of Presentation: 東海村
  • Year and Date: 2012-12-18
• [Presentation] 非共鳴X線回折実験によるURu2Si2の隠れた秩序に伴う多重極秩序の検証 (2012)
  • Author(s): 高阪勇輔、大隅寛幸、竹下聡史、有馬孝尚、高田昌樹、網塚浩、田端千紘、椎名亮輔、秋光純
  • Organizer: 日本物理学会2012年秋季大会
  • Place of Presentation: 横浜
  • Year and Date: 2012-09-18
• [Presentation] 偏光X線を活用したキラル磁性・マルチフェロイックス研究 (2012)
  • Author(s): 大隅寛幸
  • Organizer: SPring-8シンポジウム2012
  • Place of Presentation: 吹田
  • Year and Date: 2012-08-25
• [Presentation] "Simultaneous Investigation on Valence and Magnetic Orderings in Multiferroic LuFe_2O_4 (2012)
  • Author(s): H. Ohsumi
  • Organizer: SAGAMORE XVII Conference on Electron Charge, Spin and Momentum Densities
  • Place of Presentation: Kitayuzawa, Japan
  • Year and Date: 2012-07-17