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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
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥5,400,000 (Direct Cost: ¥5,400,000)
Fiscal Year 1993: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1992: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1991: ¥4,300,000 (Direct Cost: ¥4,300,000)
KeywordsMetastable atom / Many-electron effects / Solid surface / 電子分光 / 電子状態 / スピン状態 / メタステ-ブル原子 / スピン選別 / 多体効果 / 表面磁性
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.

Report

(4 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • 1991 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 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
    • Related Report
      1993 Final Research Report Summary
  • [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
    • Related Report
      1993 Final Research Report Summary
  • [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
    • Related Report
      1993 Final Research Report Summary
  • [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
    • Related Report
      1993 Final Research Report Summary
  • [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
    • Related Report
      1993 Final Research Report Summary
  • [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
    • Related Report
      1993 Final Research Report Summary
  • [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
    • Related Report
      1993 Final Research Report Summary
  • [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
    • Related Report
      1993 Final Research Report Summary
  • [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
    • Related Report
      1993 Final Research Report Summary
  • [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
    • Related Report
      1993 Final Research Report Summary
  • [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
    • Related Report
      1993 Final Research Report Summary
  • [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
    • Related Report
      1993 Final Research Report Summary
  • [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
    • Related Report
      1993 Final Research Report Summary
  • [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
    • Related Report
      1993 Final Research Report Summary
  • [Publications] S.Masuda: "The CO-CO interactions in transition-metal hexacdrbonyls" J.Chem.Phys.96. 2469-2474 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] S.Masuda: "Observation of Auger transitions across the surface states of Si(III)7×7" Solid State Commun.82. 587-590 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] S.Masuda: "Deexcitation of rare-gas metastable atoms on semiconductor surfaces" Surf.Sci.283. 78-83 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] S.Masuda: "Observation of anomalously enhanced satellite" Phys.Rev.Lett.71. 4214-4217 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 増田 茂: "準安定原子による表面励起過程" 表面科学. 14. 2-8 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] S.Masuda: "The CO-CO interactions in transition-metal haxacarbonyls studied by Penning ionization spectroscopy" J.Chem.phys.96. 2469-2474 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] S.Masuda: "Observation of Auger transitions across the surface states of Si(111)-7×7 surface by MAES." Solid State Commun.82. 587-590 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] S.Masuda: "Deexcitation of rare-gas metastable atoms on semiconductor surfaces." Surf.sci.

    • Related Report
      1992 Annual Research Report
  • [Publications] S.Masuda: "The COーCO interactions in Transitionーmetal hexacarbonyls studied by Penning ionization spectroscopy." J.Chem.Phys.

    • Related Report
      1991 Annual Research Report
  • [Publications] S.Masude: "Obser vation of Auger transitions across the surface states of Si(111)-7×7 surface by metastable atom electron spectroscopy." Solid State Commun.

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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