[en] Measurements have been made of projectile K-Auger-electron emission during interactions of 60-keV N⁶⁺ ions grazingly incident on a Au(011) single crystal whose work function was modified by submonolayer deposits of Cs. K Auger spectra were obtained for incidence angles in the range 0.3 degree--5 degree, using clean, as well as cesiated, Au surfaces whose work function had been reduced by as much as 3.3 eV. For incidence angles smaller than 5 degree, an enhancement on the above-surface K Auger component, relative to that observed for ''clean'' Au, could be discerned with decreasing surface work function, which appears to saturate below 0.7 degree (corresponding to an inverse perpendicular velocity of about 200 a.u.^-1) at approximately 30--35 %. The experimental results are compared with modeling studies of the work-function dependence of above-surface neutralization and projectile K Auger emission, using a simulation based on the classical over-the-barrier model that was modified to treat the case of a ''two-component'' surface. The simulation results agree qualitatively with the experimental results up to v_{perpendicular}^-1=200. At higher inverse perpendicular velocities, the simulated enhancement continues to increase and exceeds the clean Au result by more than a factor of 2 at v_{perpendicular}^-1=1000. Speculations about possible reasons for this discrepancy will be presented