We have used reflectance anisotropy spectroscopy to determine the surface dielectric anisotropy of Au(110) under ultrahigh-vacuum conditions. Additional angle-resolved photoemission spectroscopy measurements were carried out to correlate surface optical with surface electronic properties. The surface dielectric anisotropy mainly results from single-particle excitations involving the near surface bulk d and sp bands and free-electron contributions in the spectral region below ~2.4 eV. Surface-state contributions to the surface optical properties of Au(110) are discussed.
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Stahrenberg et al. (2001) studied this question.
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