Changes in the electronic structure of a W(110) surface, caused by hydrogen-induced reconstruction, were observed using angle-resolved photo-emission spectroscopy. For the unreconstructed H/W(110) surface, a number of hydrogen-induced states were observed, and some of them were found to be in the projected bulk band gap. As W(110) underwent the surface reconstruction induced by further hydrogen adsorption, one of those states was rapidly quenched, while others simply shift downward in energy by a fraction of an electron volt. To understand the surface reconstruction mechanism for this system, the surface electronic states before and after the surface reconstruction were calculated using the “simple” tight-binding method. The driving mechanism for the hydrogen-induced surface reconstruction was briefly discussed.

Hydrogen-Induced Reconstruction of a W(110) Surface Studied by Angle-Resolved Photoemission Spectroscopy. Y.Aiura, H.Yanashima, H.Fukutani, H.Kato, Y.Sakisaka, T.Maruyama, K.Edamoto: Surface Science, 1993, 283[1-3], 344-8