The occupied and unoccupied states of ferrimagnetic metals Fe7S8 and Fe7Se8, and a paramagnetic metal Co7Se8 have been studied by photoemission and X-ray inverse photoemission spectroscopies. Compared with the density of states (DOS) given by the band-structure calculation, the photoemission spectra of Fe 3d and Co 3d are narrowed. While the Fe 3d photoemission spectrum has a strong intensity at the higher binding energy side, it is significantly suppressed near the Fermi level. Self-energy corrections to the DOS's have been done for Fe7Se8 and Co7Se8. Disagreements between experimental and theoretical spectra have become small, indicating the importance of electron correlation effect.
|ジャーナル||Journal of Electron Spectroscopy and Related Phenomena|
|出版ステータス||Published - 1999|
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