Photo-Induced Phenomera in Isolated Selenium Chains

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概要

• 論文の詳細を見る

• Photoacoustic spectroscopy, ESR and EXAFS measurements have been carriedout on the Se chains isolated in the channels of mordenite crystal with 6.7 A diameter.The optical gap is estimated to be 2.3 eV at room temperature, which is much largerthan that of trigonal Se. At low temperatures, illumination with the light havingenergy near or above the optical gap induces new absorption bands at 1.85 and 2.25eV, which are associated with paramagnetic defects. Higher energy light (>2.9 eV)shifts the absorption edge to lower energy. The fluctuations in the covalent bondlength increase with illumination, though the helical chain structure is preserved.These changes vanish by annealing at room temperature. The phenomena are reversi-ble in the illumination and annealing cycle. The photo-induced absorption and theedge shift are reduced when the induced bands are excited optically.

• 社団法人日本物理学会の論文
• 1989-05-15

著者

• AJIRO Yoshitami

  Department of Chemistry, Graduate School of Science, Kyoto University

• Inui Masanori

  Department of Physics, College of General Education, Kyushu University

• YAO Makoto

  Department of Physics, Graduate School of Science, Kyoto University

• Ajiro Yoshitami

  Department Of Applied Physics Faculty Of Engineering Fukui University

• KATAYAMA Yoshinori

  Department of Synchrotron Radiation Research, Japan Atomic Energy Research Institute

• Endo Hirohisa

  Department of Physics, Faculty of Science, Kyoto University

• Yao Makoto

  Department Of Physics Faculty Of Science Kyoto University

• Kiyanagi Y

  Hokkaido Univ. Sapporo

• Endo H

  Faculty Of Science Kyoto University

• Endo Hirohisa

  Department Of Physics Faculty Of Science Kyoto University

• Kawakita Y

  Department Of Physics Faculty Of Sciences Kyushu University

• Endo Hirohisa

  Department Of Physics Kyoto University

• Kiyanagi Yoshiaki

  Department Of Nuclear Engineering Faculty Of Engineering Hokkaido University

• Kiyanagi Yoshiaki

  Department Of Nuclear Engineering Hokkaido University

• Katayama Y

  Department Of Physics Faculty Of Science And Technology Keio University

• Katayama Yoshinori

  Department Of Physics Faculty Of Science And Technology Keio University

• Endo Hirohisa

  Department Of Infection Control And Prevention University Of Tokyo Hospital

• Katayama Yoshinori

  Department Of Pediatrics & Neonatology Takatsuki General Hospital

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