Angle-resolved photoemission study of the valence-band structure of VN/sub 0. 89/(100)
The electronic structure of a VN/sub 0.89/(100) single crystal has been studied using angle-resolved photoemission spectroscopy and synchrotron radiation. Recorded normal-emission spectra are compared with theoretical photoemission spectra calculated for stoichiometric composition. A good overall agreement between recorded and calculated spectra is found for photon energies below about 35 eV. A mapping of the band structure is made and compared with a theoretical bulk-band structure. The experimentally determined dispersions of the energy bands are found to be smaller than those theoretically predicted and the location of the bands deviates, in some cases considerably. A vacancy-induced structure is identified at 2.8 eV below the Fermi energy in spectra recorded at photon energies above 31 eV. The character of the vacancy-induced states and of states located close to the Fermi energy is discussed based on observed intensity enhancements above the V 3p absorption threshold.
- Research Organization:
- Department of Physics and Measurement Technology, Linkoeping University, S-581 83 Linkoeping, Sweden
- OSTI ID:
- 5679866
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:18; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
BREMSSTRAHLUNG
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DISPERSION RELATIONS
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
MONOCRYSTALS
NITRIDES
NITROGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PNICTIDES
POINT DEFECTS
RADIATIONS
SPECTROSCOPY
STOICHIOMETRY
SYNCHROTRON RADIATION
TRANSITION ELEMENT COMPOUNDS
VACANCIES
VANADIUM COMPOUNDS
VANADIUM NITRIDES