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Spin resolved resonant inverse photoemission

Research Project

Project/Area Number 09640388
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体物性Ⅰ(光物性・半導体・誘電体)
Research InstitutionThe University of Tokyo

Principal Investigator

FUJISAWA Masami  The University of Tokyo, Research institute for Solid State Physics, Research Associate, 物性研究所, 助手 (70126093)

Co-Investigator(Kenkyū-buntansha) TEZUKA Yasuhisa  Hirosaki University, Associate professor, 物性研究所, 助手 (20236970)
KAKIZAKI Akito  The University of Tokyo, High Energy Accelerator Research Organization, Professo, 教授 (60106747)
SHIN Shik  The University of Tokyo, Research institute for Solid State Physics, Associate p, 物性研究所, 助教授 (00162785)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1998: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1997: ¥2,600,000 (Direct Cost: ¥2,600,000)
KeywordsSpin Resolved / Inverse Photemission / electrongun / spectroscopy
Research Abstract

In this year, we made spin resolved electron g^<uc>. The electron source of the g^<un> is made by Cs coated GaAsP, where Cs decreases the work function. This is NEA cathod type.
The experiments were carried Out by the SXES spectrometer that was made by us. The RIPES measurement near Ce 4d absorption edge reveals the remarkable contrastive electronic structure at the bulk and surface state of CePd_7. The RIPES at Ce 4d * 4f edge is found to be a powerful method to investigate the surface 4f state. The bulk is alpha-like and the surface is gamma-like. The difference of the ground state configuration at the bulk and surface reflects the separate resonances. The extremely high Kondo temperature (kT_K-O.95 eV) of bulk expresses the very strong hybridization between the 4f and ligand electrons. Our results are consistent with the calculated results. Due to the large Ce-Ce spacing, the calculation within the framework of IAM seems to give a good agreement. The resonant enhancement of 4f-cross section makes it possible to distinguish between the specific contributions in the spectra near Fermi level. It is pointed out that the RIPES measurement around Ce 4d edge has high sensitivity to the surface. Also, the energy band scheme (LMTO) gives a qualitatively good agreement with the off resonance spectra, which are mainly of Ce 5d origin. However, band calculation underestimates the energy position of the Ce 5d component above the Fermi level by about 1.4 eV.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] K.Soda: "Inverse photoemission and soft x-ray emission spectra of Al-Ni-Co decagonal single quasicrystal," J.Electron Spec.and Related Phenomina. 88-91. 415-418 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] H.Ishii: "Resonant inverse photoemission study of NiS_<2-x>Se_x" J.Electron Spec.and Related Phenomina. 92. 77-80 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Kanai: "Temperature dependence of inverse photoemission spectra at Ce 4d absorption edge of CePd_3" J.Electron Spec.and Related Phenomina. 92. 81-85 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Soda: "Inverse photoemission and soft x-ray emission spectra of Al-Ni-Co decagonal single quasicrystal." J.Electron Spec.and Related Phenomina. 88-91. 415-418 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] H.Ishii: "Resonant inverse photoemission study of NiS2-xSex" J.Electron Spec.and Related Phenomina. 92. 77-80 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Kanai: "Temperature dependence of inverse photoemission spectra at Ce 4d absorption edge of CePd3" J.Electron Spec.and Related Phenomina. 92. 81-85 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Soda: "Inverse photoemission and soft x-ray cmission spectra of Al-Ni-Co decagonal single quasicrystal" J.Electron Spec.and Rclated Phenomina. 88-91. 415-418 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] H.Ishii: "Resonant inverse photoemission study of NiS_<2-x>Se_x" J.Electron Spec.and Related Phenomina. 92. 77-80 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Kanai: "Temperature dependence of inverse photoemission spectra at Ce 4d absorption edge of CePd_3" J.Electron Spec.and Related Phenomina. 92. 81-85 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Tezuka: "Ti2p-,Ti3p-,and O1s-resonant photoemission studies of Ti2O3" J.Phys.Soc.jap.66. 3153-3158 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] N.Yamada: "Polarization analysis of absorption at the O1s absorption edge inPrBa2Cu3O7:Unusual electronic structure in CuO2 plane." Physica C. 282-287. 963-964 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Tezuka: "Ti2p-,Ti3p-,and O1s-resonant photoemission studies of Ti2O3" J.Phys.Soc.Jap.66. 3153-3158 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Kanai: "Temperature dependence of inverse photoemission spectra at Ce 4d absorption edge of CePd3" J.Electron Spec.and Related Phenomina.

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Ishii: "Resonant inverse photoemission study of NiS2-xSeX" J.Electron Spec.and Related Phenomina.

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Tezuka: "Soft x-ray resonant inverse photoemission" J.Appl.Phys.

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2020-05-15  

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