Surface structure determination ofCeO2(001)by angle-resolved mass spectroscopy of recoiled ions

Angle-resolved mass spectroscopy of recoiled ions data was obtained for the ${\mathrm{CeO}}_2\mathrm{}\left(001\right)\mathrm{}$ surface. Prior theoretical investigations have suggested that the $(1\mathrm{}\times 1)$ unreconstructed surface, terminated with bulk equivalent layers of either cerium or oxygen, is unstable due to a nonzero surface dipole. In this investigation, it was experimentally determined that the surface is terminated with 0.5 monolayers of oxygen. This model results in a stable surface with a zero dipole moment.