Photoemission study of pyrite-type transition-metal chalcogenides MS2 - xSex (M=Fe, Co, Ni)

K. Mamiya, T. Mizokawa, A. Fujimori, H. Takahashi, N. Môri, T. Miyadai, S. Suga, Nirmala Chandrasekharan, S. R. Krishnakumar, D. D. Sarma

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The electronic structures of pyrite-type transition-metal chalcogenides MS2 - xSex (M = Fe, Co, Ni) has been investigated by photoemission and inverse-photoemission spectroscopy. The valence-band spectrum of ferromagnetic CoS2 does not show exchange splitting of the Co 3d peak, in disagreement with band-structure calculations. High-resolution photoemission spectra of NiS1.55Se0.45 shows spectral weight transfer from low (≃50 meV) to high (0.2-0.5 eV) binding energies, in going from the metallic to the insulating phase.

Original languageEnglish
Pages (from-to)390-391
Number of pages2
JournalPhysica B: Condensed Matter
Volume237-238
DOIs
Publication statusPublished - 1997 Jul

Keywords

  • Electronic structure
  • Metal-insulator transition
  • Photoemission spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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