Polarization-dependent surface extended X-ray absorption fine-structure measurements on the O(2 x 1)/Cu(110) system show that every second [001] Cu row on the surface was missing, thus excluding the buckled-row model for the reconstruction. A surface extended X-ray absorption fine-structure amplitude comparison clearly favours the missing-row over the saw-tooth model. It also provides evidence for a strong anisotropy of both the surface mean free path and the surface Debye-Waller factor.

Surface Extended X-Ray Absorption Fine-Structure Study of the O(2 x 1)/Cu(110) System - Missing-Row Reconstruction and Anisotropy in the Surface Mean Free Path and in the Surface Debye-Waller Factor. M.Bader, A.Puschmann, C.Ocal, J.Haase: Physical Review Letters, 1986, 57, 3273-6