Photoemission spectroscopy of correlated transition-metal compounds in the charge-transfer regime

A. Fujimori, K. Mamiya, Takashi Mizokawa

Research output: Contribution to journalArticle

Abstract

An overview is given on the effects of strong d-d Coulomb repulsion on the electronic structure of charge-transfer (CT)-type 3d transition-metal (TM) compounds, especially of 3d TM chalcogenides. Mean-field effects determine the ground-state properties of the system including magnetic and orbital ordering whereas correlation effects are necessary to correctly describe excitation properties such as photoemission spectral weight distribution. Because of the strong d-d repulsion even in the metallic state of CT-type compounds, the overall photoemission spectral line shapes remain relatively unchanged across metal-insulator transitions. In the vicinity of the Fermi level, high-resolution photoemission spectra exhibit unusual line shapes and spectral weight transfer, which implies strong renormalization of quasi-particles due to electron correlation.

Original languageEnglish
Pages (from-to)137-141
Number of pages5
JournalPhysica B: Condensed Matter
Volume237-238
Publication statusPublished - 1997 Jul
Externally publishedYes

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Keywords

  • Electron correlation
  • NiS
  • NiS
  • Photoemission spectroscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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