Photoexcitations in the strongly correlated 1D electron system of halogen-bridged Ni compounds

H. Okamoto, H. Kishida, M. Ono, H. Matsuzaki, M. Yamashita, T. Manabe

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)


To study nature of photo-excited states in one-dimensional (1D) strongly correlated electron systems, we have synthesized the halogen(X)-bridged Ni compounds, [Ni(chxn)2X]Y2 (X = Cl or Br; Y = Cl, Br, NO3 or ClO4; (chxn) = cyclohexanediamine), which have 1D Ni-X chains. These Ni compounds are charge-transfer (CT) insulators, showing strong CT transitions from the occupied halogen p band to the Ni d upper Hubbard band. The CT transition energies can be systematically controlled from 1.3 to 2.0 eV by the choice of the bridging-halogen ions X and the counter ions Y. From the excitation profiles of the photoconductivities, excitonic effects in the Ni-X chains have been found to depend strongly on the degree of pd hybridization.

Original languageEnglish
Pages (from-to)204-206
Number of pages3
JournalJournal of Luminescence
Publication statusPublished - 2000 May
Externally publishedYes
EventInternational Conference on Luminescence and Optical Spectroscopy of Condensed Matter (ICL'99) - Osaka, Jpn
Duration: 1999 Aug 231999 Aug 27

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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