H on Mo(100): Photoemission Result and Its Significance to the Correlation between the Surface Resonances and the Surface Reconstruction

Photoemission indicates that the surface resonances on Mo(100) are not removed entirely by the adsorption of ${\mathrm{H}}_2$. It also shows two H-induced states below the bulk $d$-band edge with the binding energies independent of coverage and in good agreement with a calculation. The results indicate that H on Mo(100) is bridge bonded with the local bonding configuration relatively unchanged by reconstruction. A significant correlation between the surface resonances and the surface reconstruction is suggested.