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

The Role of Surface States in the Na/Cu(110)(1 x 2) Reconstruction. D.S.Martin, P.Weightman: Journal of Physics - Condensed Matter, 2002, 14[4], 675-80