Abstract
Reflection anisotropy spectroscopy (RAS) is combined with scanning tunnelling microscopy in a study of the Na/Cu(110)(1×2) surface reconstruction induced on the thermally roughened Cu(110) surface. The roughening transition of Cu(110) generates a surface morphology consisting of a high density of exclusively monatomic height steps. This surface is further characterized by the irreversible loss of the 2.1 eV RAS feature and an enhancement in the response around 4 eV. Na deposition onto the roughened surface results in the formation of the (1×2) reconstruction. We show that the occupancy of the surface state near the Fermi level at Ȳ on Cu(110) is not a prerequisite for surface reconstruction.
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