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1993 Fiscal Year Final Research Report Summary

Electron spectroscopy using spin-selected metastable atoms

Research Project

Project/Area Number 03452033
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 固体物性
Research InstitutionThe University of Tokyo

Principal Investigator

MASUDA Shigeru  The University of Tokyo, College of Arts and Sciences, Assistant, 教養学部, 助手 (50173745)

Project Period (FY) 1991 – 1993
KeywordsMetastable atom / Many-electron effects / Solid surface
Research Abstract

Metastable atom electron spewctroscopy is based on an analysis of electrons emitted by thermal collisions between rare-gas metastable atoms and solid surface. Since metastable atoms such as He^<**>(1s2s, 2^3S) can not penetrate into the bulk, the localionization takes place at the outermost surface layr. Further, the electron emission occurs through electron transfer from the metastable atom to solid surface, hence the transition rate is governed essentially by the spatial distribution of wave-function of the surface. Using these features, we have applied this method to probe the electronic structure of transition-metal oxides, in which the electron correlation effects plays an important role.
The electron emission spectrum of LaCoO_3 using He^<**>(1s2s, 2^3S) shows that the lower-lying Co 3d-derived (main) bands are strongly suppressed relative to the O 2p-derived bands, reflecting the spatial distribution of the initial Co 3d wave-functions. On the other hand, the higher-lying Co 3d-derived (satellite) band is anomalously enhanced in the He^<**> spectrum. These findings are discussed on the basis of the initial and final configuration interactions, using Co_2O_<11> cluster.

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] S.Masuda: "The CO-CO interactions in transition-metal hexacarbonyls studied by Penning ionization electron spectroscopy." J.Chem.Phys.96. 2469-2474 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Masuda: "Observation of Auger transitions across the surface states of Si(111)-7x7 by metastable atom electron spectroscopy." Solid State Commun.82. 587-590 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Masuda: "Deexcitation of rare-gas metastable atoms on semiconductor surfaces:MoS_2 and LaCoO_3." Surf.Sci.283. 78-83 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Awaga: "Photoelectron spectroscopic studies of an α-nitronyl nitroxide radical:mechanism of ferromagnetic intermolecular interaction." Mol.Cryst.Liq.Cryst.232. 27-34 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Masuda: "Observation of anomalously enhanced satellite in metastable atom electron spectrum of LaCoO_3." Phys.Rev.Lett.71. 4214-4217 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 増田茂: "準安定励起原子による表面励起過程" 表面科学. 14. 2-8 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Masuda: "Analysis of charge transfer complex formation in the solid state by Penning ionization electron spectroscopy." Kodansha,edited by Y.Ohashi, 16 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Masuda and Y.Harada: "The CO-CO interactions in transition-metal hexacarbonyls studied by Penning ionization electron spectroscopy ; Cr(CO)_6, Mo(CO)_6 and W(CO)_6" J.Chem.Phys.96. 2469-2474 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Masuda, H.Ishii and Y.Harada: "Observation of Auger transitions across the surface states of Si(111)-7x7 by metastable atom electron spectroscopy" Solid State Commun. 82. 587-590 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Masuda and Y.Harada: "Deexcitation of rare-gas metastable atoms on semiconductor surfaces : MoS_2 and LaCoO_3" Surf.Sci.283. 78-83 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Awaga, T.Yokoyama, T.Fukuda, S.Masuda, Y.Harada, Y.Maruyama and N.Sato: "Photoelectron spectroscopic studies of an alpha-nitronyl nitroxide radical : mechanism of ferromagnetic intermolecular interaction" Mol.Cryst.Liq.Cryst.232. 27-34 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Masuda, M.Aoki, Y.Harada, H.Hirohashi, Y.Watanabe, Y.Sakisaka and H.Kato: "Observation of anomalously enhanced satellite in metastable atom electron spectrum of LaCoO_3" Phys.Rev.Lett.71. 4214-4217 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Masuda: "Solid surface excitation processes by rare-gas metastable atoms (in Japanese)" Hyomen Kagaku. 14. 2-8 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Masuda: Analysis oi charge transfer complex formation in the solid state by Penning ionization electron spectroscopy. Reactivity in molecular crystals, edited by Y.Ohashi (Kodansha), 58-74 (1993)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1995-03-27  

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