(1 x 1) rippled relaxation of (100) transition-metal carbide surfaces
Journal Article
·
· J. Vac. Sci. Technol., A; (United States)
An investigation of (100) surfaces of TaC and HfC was performed using low-energy electron diffraction (LEED) and angle-resolved ultraviolet photoemission spectroscopy with synchrotron radiation. Detailed LEED I--V analyses show that, on both surfaces, carbon atoms displace outward and metal atoms inward, giving rise to (1 x 1) rippled relaxations, with the magnitude of the ripple being larger on TaC(100). Photoemission spectra of metal 4f levels from these surfaces show no obvious surface core-level shifts. Using x-ray photoemission spectroscopy (XPS) and Auger electron spectroscopy (AES), changes in (bulk) core-level binding energies, valence-band structures, and local carbon environments were determined for TaC/sub x/ (0.5
- Research Organization:
- Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6030
- OSTI ID:
- 6116228
- Journal Information:
- J. Vac. Sci. Technol., A; (United States), Journal Name: J. Vac. Sci. Technol., A; (United States) Vol. 7:3; ISSN JVTAD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
AUGER ELECTRON SPECTROSCOPY
BINDING ENERGY
CARBIDES
CARBON COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
ELECTRON DIFFRACTION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
EMISSION
ENERGY
ENERGY LEVELS
F STATES
HAFNIUM CARBIDES
HAFNIUM COMPOUNDS
M SHELL
PHOTOEMISSION
REFRACTORY METAL COMPOUNDS
RELAXATION
SCATTERING
SECONDARY EMISSION
SPECTRA
SPECTROSCOPY
SURFACE PROPERTIES
TANTALUM CARBIDES
TANTALUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ULTRAVIOLET SPECTRA
360104* -- Metals & Alloys-- Physical Properties
AUGER ELECTRON SPECTROSCOPY
BINDING ENERGY
CARBIDES
CARBON COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
ELECTRON DIFFRACTION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
EMISSION
ENERGY
ENERGY LEVELS
F STATES
HAFNIUM CARBIDES
HAFNIUM COMPOUNDS
M SHELL
PHOTOEMISSION
REFRACTORY METAL COMPOUNDS
RELAXATION
SCATTERING
SECONDARY EMISSION
SPECTRA
SPECTROSCOPY
SURFACE PROPERTIES
TANTALUM CARBIDES
TANTALUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ULTRAVIOLET SPECTRA