Transition-metal monoxides: band or Mott insulators? Angle-resolved photoemission results for CoO
- 3 July 1989
- journal article
- letter
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 1 (26) , 4267-4272
- https://doi.org/10.1088/0953-8984/1/26/022
Abstract
Evidence of itinerant band-like behaviour of the Co 3d states in paramagnetic CoO has been observed in CoO(001) angle-resolved photoemission spectra. Two d bands are identified, which disperse 0.4 eV and 1.7 eV between Gamma and X. In broad terms the results are consistent with a recently proposed model of the electronic structure in which the insulating gap arises largely from an exchange potential perturbation of the one-electron band structure.Keywords
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