Vibrationally Induced Inelastic Structures in Laser Photoemission Spectra

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  • ARAFUNE Ryuichi
    PRESTO “Structure Function and Measurement Analysis”, Japan Science and Technology Agency (JST)
  • HAYASHI Kei
    Graduate School of Engineering, Tohoku University
  • TAKAGI Noriaki
    Department of Advanced Materials Science, University of Tokyo
  • KAWAI Maki
    Department of Advanced Materials Science, University of Tokyo RIKEN
  • UEHARA Yoichi
    Research Institute of Electrical Communication, Tohoku University
  • USHIODA Sukekatsu
    Japan Advanced Institute of Science and Technology

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Other Title
  • レーザー光電子スペクトル中に現れる振動励起非弾性構造
  • レーザー コウデンシ スペクトルチュウ ニ アラワレル シンドウ レイキ ヒダンセイ コウゾウ

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Abstract

We have succeeded in observing vibrationally induced inelastic structures in the photoemission spectra of carbon monoxide or oxygen covered Cu(001) surfaces excited by laser light. The structure appears as a step at the vibrational energy below the Fermi level. We found that the CO/Cu(001) spectra contain two step structures arising from the C-O internal stretching mode and the frustrated rotation mode. These steps shift to lower energy for 13C18O. In the O/Cu(001) spectra we have observed the inelastic structures originating from not only adsorbate-substrate vibrations but also substrate surface phonons.

Journal

  • Hyomen Kagaku

    Hyomen Kagaku 28 (7), 378-384, 2007

    The Surface Science Society of Japan

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