Electron Dynamics Probed by Time-Resolved Hard X-ray Photoelectron Spectroscopy

• Oura Masaki

  RIKEN SPring-8 Center

• Oloff Lars-Philip

  RIKEN SPring-8 Center Institute of Experimental and Applied Physics, University of Kiel

• Chainani Ashish

  RIKEN SPring-8 Center

• Rossnagel Kai

  RIKEN SPring-8 Center Institute of Experimental and Applied Physics, University of Kiel

• Matsunami Masaharu

  RIKEN SPring-8 Center UVSOR, Institute for Molecular Science

• Eguchi Ritsuko

  RIKEN SPring-8 Center Research Laboratory for Surface Science, Okayama University

• Kiss Takayuki

  RIKEN SPring-8 Center Graduate School of Engineering Science, Osaka University

• Yamaguchi Takashi

  Graduate School of Engineering Science, Osaka University

• Nakatani Yasuhiro

  Graduate School of Engineering Science, Osaka University

• Miyawaki Jun

  ISSP/The University of Tokyo

• Yamagami Kohei

  Graduate School of Engineering Science, Osaka University

• Taguchi Munetaka

  RIKEN SPring-8 Center

• Togashi Tadashi

  JASRI/XFEL

• Katayama Tetsuo

  JASRI/XFEL

• Ogawa Kanade

  RIKEN SPring-8 Center

• Yabashi Makina

  RIKEN SPring-8 Center

• Gejo Tatsuo

  RIKEN SPring-8 Center Graduate School of Material Science, University of Hyogo

• Myojin Katsumi

  RIKEN SPring-8 Center Graduate School of Material Science, University of Hyogo

• Tamasaku Kenji

  RIKEN SPring-8 Center

• Tanaka Yoshihito

  RIKEN SPring-8 Center Graduate School of Material Science, University of Hyogo

• Ebihara Takao

  Department of Physics, Graduate School of Science, Shizuoka University

• Ishikawa Tetsuya

  RIKEN SPring-8 Center

抄録

We have realized element-specific pump-probe time-resolved hard X-ray photoelectron spectroscopy (TR-HAXPES) for the study of ultrafast electron dynamics in condensed matter. TR-HAXPES has been applied for the first time to determine the temporal evolution of space-charge effects on Ti 1s core-level photoelectron spectra of SrTiO₃ at the SACLA X-ray free electron laser facility. We found that the temporal evolution of Ti 1s kinetic energy shifts can be well explained by a mean-field model for the electron propagation in the vacuum. We also report preliminary results of a real-time laser-assisted valence-transition in YbInCu₄, observed by measuring Yb 3d_5/2 core-level HAXPES spectra at BL19LXU of SPring-8, under ON/OFF conditions of an optical pump-laser. We observed drastic changes in intensities of the Yb²⁺ and Yb³⁺ spectral components induced by pump-laser irradiation.

収録刊行物

• Transactions of the Materials Research Society of Japan

  Transactions of the Materials Research Society of Japan 39 (4), 469-473, 2014

  一般社団法人 日本MRS

キーワード

• electron dynamics
• time-resolved measurement
• HAXPES

詳細情報

• CRID: 1390001205512083456
• NII論文ID: 130005004383
• DOI: 10.14723/tmrsj.39.469
• ISSN: 21881650
• ISSN: 13823469
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可