Influence of reconstruction on the surface state of Au(110)

We present high-resolution angle-resolved photoelectron spectroscopy on Au(110). The unreconstructed surface shows a Shockley-type surface state at E-0=590 meV whereas on the (2x1) missing-row reconstructed surface no such surface state below E-F can be detected. We performed relativistic local-density approximation calculations which agree well with our experimental data. Adsorption of 1 monolayer Ag on the (2x1) reconstructed surface results in a destruction to a (1x1) surface structure and a Shockley state appears at E-0=475 meV. Shifting down the surface state from just above to below E-F by Na adsorption allowed to extrapolate a binding energy on the reconstructed surface of E-0=-120 meV above the Fermi level.