The effect of electromodulation of surface states on the electroreflectance of Ag(110) is investigated with use of results from a first-principles, self-consistent pseudopotential calculation of the surface electronic structure. Our model explains the polarization anisotropy observed on the (110) face of Ag, Cu, and Au. A broadening of the surface state by ∼ 1 eV is explained by interactions of water dipoles at the metal-electrolyte interface.

• Received 3 March 1980

DOI:https://doi.org/10.1103/PhysRevLett.44.1531