Local bonding geometry of O(2×1) on Ni(110): A surface extended x-ray-absorption fine-structure study
Abstract
Oxygen K-edge surface extended x-ray-absorption fine-structure spectra measured with significantly improved signal-to-noise ratio reveal novel features of the intriguing (2×1) oxygen-induced reconstruction of Ni(110). The spectrum obtained for E parallel to [001] unambiguously indicates that each oxygen sits in a long-bridge position 0.56 Å away from the nearest topmost Ni row. The relatively short Ni-O distance inferred from data obtained with E parallel to [1¯10] can only be explained if each oxygen is tilted towards (100) facets of the reconstructed substrate. The amplitude ratio A1¯10/A001 favors the sawtooth model over the missing-row model.
- Publication:
-
Physical Review B
- Pub Date:
- April 1986
- DOI:
- 10.1103/PhysRevB.33.5910
- Bibcode:
- 1986PhRvB..33.5910B
- Keywords:
-
- 68.35.Bs;
- 78.70.Dm;
- Structure of clean surfaces;
- X-ray absorption spectra