Para- to ferromagnetic phase transition of CoS2 studied by high-resolution photoemission spectroscopy

T. Takahashi, Y. Naitoh, T. Sato, T. Kamiyama, K. Yamada, H. Hiraka, Y. Endoh, M. Usuda, N. Hamada

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19 Citations (Scopus)

Abstract

We have performed temperature-dependent ultrahigh-resolution (ΔE∼7 meV) photoemission spectroscopy on CoS2 across the para- to ferromagnetic transition and found a remarkable temperature-induced spectral change near EF. Comparison With the band-structure calculation shows that a sharp peak at EF in the photo-emission spectrum below Curie temperature (12 K) is ascribed to the eg↓ subband due to the exchange splitting, indicating that the eg↓ band is partially filled in the ferromagnetic phase. The present photoemission results indicate that the electronic structure and the magnetism of CoS2 are qualitatively well described by the band-structure calculation although the correlation effect substantially modifies the electronic structure.

Original languageEnglish
Article number094415
Pages (from-to)944151-944155
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number9
DOIs
Publication statusPublished - 2001 Jan 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Takahashi, T., Naitoh, Y., Sato, T., Kamiyama, T., Yamada, K., Hiraka, H., Endoh, Y., Usuda, M., & Hamada, N. (2001). Para- to ferromagnetic phase transition of CoS2 studied by high-resolution photoemission spectroscopy. Physical Review B - Condensed Matter and Materials Physics, 63(9), 944151-944155. [094415]. https://doi.org/10.1103/PhysRevB.63.094415