X-ray absorption study of the metal-nonmetal transition in nis and ni1-xmxs (M=fe and co)

Motohiko Nakamura, Hirofumi Namatame, Atsushi Fujimori, Maurizio Sacchi, John C. Fuggle, Akira Misu, Takeshi Mamori, Hikaru Tamura, Masanori Matoba, Shuichiro Anzai

Research output: Contribution to journalArticlepeer-review


We have studied the electronic structure of NiS using Ni 2p X-ray absorption spectroscopy and subsequent cluster-model analysis. The results indicate that with Fe substitution or with decreasing temperature, the S 3p-to-Ni 3d charge-transfer energy increases and the Ni 3d-S 3p transfer integral decreases leading to the increase in the band gap and with Co substitution the band widths increase through the Ni 3d-to-Co 3d hybridization leading to the collapse of the bandgap.

Original languageEnglish
Pages (from-to)306-307
Number of pages2
JournalJapanese journal of applied physics
Issue numberS3
Publication statusPublished - 1993 Jan


  • Cluster-model
  • Metal-nonmetal transition
  • NiCoS
  • NiFeS
  • NiS
  • X-ray absorption

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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