Determination of the electronic structure in the strongly correlated 1-D electron systems: X-ray photoelectron and auger spectroscopy of halogen-bridged nickel complexes

H. Okamoto, A. Chainani, T. Takahashi, H. Kitagawa, T. Mitani, T. Manabe, M. Yamashita

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The electronic structure of the 1-D Ni complexes, [Ni(chxn)2X]X2 (X=Br, Cl) is studied together with the discrete Ni complexes, [NiX2([14]aneN4)]C1O4(X=Br, Cl), using X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES). An analysis using a simple X-Ni-X trimer model on the Ni 2p XP spectra yields quantitative estimates for the charge transfer (CT) energy Δ and the transfer energy T. An analysis on the Ni LVV Auger spectra indicates that the average on-site Coulomb energy U in these Ni complexes is about 5 eV. The obtained results demonstrate that the 1-D Ni complexes are CT insulators.

Original languageEnglish
Pages (from-to)2139-2140
Number of pages2
JournalSynthetic Metals
Volume86
Issue number1-3
DOIs
Publication statusPublished - 1997 Feb 28

Keywords

  • Auger electron spectroscopy
  • Photoelectron spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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