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Dynamics of Photoelectrons and Structural Changes of Tungsten Trioxide Observed by Femtosecond Transient XAFS |
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| Authors: | Prof Yohei Uemura Daiki Kido Dr Yuki Wakisaka Dr Hiromitsu Uehara Dr Tadashi Ohba MSc Yasuhiro Niwa Dr Shunsuke Nozawa Dr Tokushi Sato Dr Kohei Ichiyanagi Dr Ryo Fukaya Prof Shin‐ichi Adachi Dr Tetsuo Katayama Dr Tadashi Togashi Dr Sigeki Owada Dr Kanade Ogawa Dr Makina Yabashi Dr Keisuke Hatada Prof Satoru Takakusagi Prof Toshihiko Yokoyama Prof Bunsho Ohtani Prof Kiyotaka Asakura |
| Institution: | 1. Institute for Molecular Science, Myodaiji-cho, Okazaki, Japan;2. Institute for Catalysis Hokkaido University, Sapporo, Japan;3. Graduate School of Science, Nagoya University, Nagoya, Japan;4. PF, IMSS, KEK, Tsukuba, Japan;5. JASRI, Kouto, Sayo-cho, Hyogo, Japan;6. RIKEN SPring-8 Center, Kouto, Sayo-cho, Hyogo, Japan;7. Département Matériaux Nanosciences,Institut de Physique de Rennes, Université de Rennes1, Rennes cedex, France |
| Abstract: | The dynamics of the local electronic and geometric structures of WO3 following photoexcitation were studied by femtosecond time‐resolved X‐ray absorption fine structure (XAFS) spectroscopy using an X‐ray free electron laser (XFEL). We found that the electronic state was the first to change followed by the local structure, which was affected within 200 ps of photoexcitation. |
| Keywords: | photoexcitation tungsten trioxide ultrafast spectroscopy XAFS X-ray free electron laser (XFEL) |