Development of local atomic environment analysis method through core exciton spectra

• Project/Area Number: 26630295
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Physical properties of metals/Metal-base materials
• Research Institution: Kyoto University
• Principal Investigator: Tanaka Isao 京都大学, 工学(系)研究科(研究院), 教授 (70183861)
• Research Collaborator: Olovsson Weine リンショーピン大学 ; Claudia Ambrosch-Draxl フンボルト大学ベルリン
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: エキシトン / フォノン / 電子エネルギー分光損失 / 第一原理計算 / フォノン相互作用

Outline of Final Research Achievements

Recent progress of the transmission electron microscopy has been allowed us to obtain the high-resolution electron energy-loss spectra (EELS). These spectra include exciton transition from core electrons which was not available through conventional EELS measurements. The present study develops novel theoretical methods that apply both of core-electron vs. exciton and exciton vs. phonon interactions based on Bethe-Salpeter equation.

Research Products

• [Journal Article] Impact of local strain on Ti-L_<2,3> electron energy-loss near-edge structures of BaTiO_3 : a first-principles multiplet study (2014)
  • Author(s): Shirou Ootsuki, Hidekazu Ikeno, Yuji Umeda, Yu Yonezawa, Hiroki Moriwake, Akihide Kuwabara, Osamu Kido, Satoko Ueda, Isao Tanaka, Yoshinori Fujikawa, and Teruyasu Mizoguchi
  • Journal Title: Microscopy, available online Volume: 63 Issue: 3 Pages: 249-254
  • DOI: 10.1093/jmicro/dfu011
  • Peer Reviewed