Electronic structure of the (1×1) oxygen overlayer on TiC(111): Angle-resolved photoemission study
Abstract
Angle-resolved photoemission spectroscopy with synchrotron radiation has been used to study the electronic state of oxygen adsorbed on a TiC(111) surface at room temperature. Oxygen is adsorbed dissociatively forming a (1×1) overlayer on the TiC(111) surface at saturation coverage. The band structure of the (1×1)-O overlayer is measured in the two symmetry directions; <21¯ 1¯>(Γ¯ M¯) and <011¯>(Γ¯ K¯) of the TiC(111) surface. The binding energy of the O 2pz-derived band is always lower than those of the O 2px- and O 2py-derived bands throughout the surface Brillouin zone, indicating that the 2px and 2py orbitals are more important for the chemisorption bond formation.
- Publication:
-
Physical Review B
- Pub Date:
- September 1992
- DOI:
- 10.1103/PhysRevB.46.7127
- Bibcode:
- 1992PhRvB..46.7127E
- Keywords:
-
- 82.65.My;
- 73.20.At;
- Surface states band structure electron density of states