Surface States of Hydrogen-terminated Si(111) by Metastable Atom Electron Spectroscopy and Angle-resolved Ultraviolet Photoelectron Spectroscopy.

  • Yasufuku Hideyuki
    Graduate School of Science and Technology, Chiba University, Inage-ku, Chiba 263-8522, Japan
  • Meguro Kazuyuki
    Graduate School of Science and Technology, Chiba University, Inage-ku, Chiba 263-8522, Japan
  • Akatsuka Shin-ichiro
    Graduate School of Science and Technology, Chiba University, Inage-ku, Chiba 263-8522, Japan
  • Setoyama Hiroyuki
    Graduate School of Science and Technology, Chiba University, Inage-ku, Chiba 263-8522, Japan
  • Kera Satoshi
    Graduate School of Science and Technology, Chiba University, Inage-ku, Chiba 263-8522, Japan
  • Azuma Yasushi
    Graduate School of Science and Technology, Chiba University, Inage-ku, Chiba 263-8522, Japan
  • Okudaira Koji K.
    Graduate School of Science and Technology, Chiba University, Inage-ku, Chiba 263-8522, Japan Department of Materials Technology, Faculty of Engineering, Chiba University, Inage-ku, Chiba 263-8522, Japan Center for Frontier Science, Chiba University, Inage-ku, Chiba 263-8522, Japan
  • Hasegawa Shinji
    Institute for Molecular Science, Okazaki 444-8585, Japan
  • Harada Yoshiya
    Life Culture Department, Seitoku University, Iwase, Matsudo 271-8555, Japan
  • Ueno Nobuo
    Graduate School of Science and Technology, Chiba University, Inage-ku, Chiba 263-8522, Japan Department of Materials Technology, Faculty of Engineering, Chiba University, Inage-ku, Chiba 263-8522, Japan Center for Frontier Science, Chiba University, Inage-ku, Chiba 263-8522, Japan

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The surface electronic states of hydrogen-terminated Si(111) [H–Si(111)-(1 × 1)] were studied by metastable atom electron spectroscopy (MAES) and angle-resolved ultraviolet photoelectron spectroscopy (ARUPS), coupled with an intensity analysis used for organic systems. The surface states of H–Si(111)-(1 × 1) originated from Si–H bonds were selectively observed by MAES which can excite electrons distributed at the outermost surface. Furthermore, the prominent ARUPS peak with very small dispersion at around 10 eV binding energy from the vacuum level was confirmed to originate from a nondispersive Si–H σ state by quantitative analysis of the photoelectron angular distribution using a simple computation model used for organic thin films.

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