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Title: Model supercell local-density calculations of the 3d excitation spectra in NiO

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)

The local-density supercell impurity approach is used to calculate the excitation spectra due to the emission and absorption of a 3d electron in the Mott insulator NiO. Good agreement is found with both photoemission (PES) and inverse photoemission (bremsstrahlung isochromat spectroscopy (BIS)) data. In particular, a BIS excitation gap of 4.1 eV is found compared to 4.3 eV experimentally. The predicted value for the screened Coulomb interaction U is 7.9 eV. These results indicate that there is no conflict between the band picture of Terakura et al. for the ground-state properties of NiO and the excited-state properties derived from PES and BIS by Sawatzky and Allen and by McKay and Henrich.

Research Organization:
Materials Science and Technology Division, Argonne National Laboratory, Argonne, Illinois 60439
DOE Contract Number:
W-31-109-ENG-38
OSTI ID:
5820713
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Vol. 33:12
Country of Publication:
United States
Language:
English