EFFECT OF HERRINGBONE RECONSTRUCTION ON INTERFERENCE OF 2-DIMENSIONALELECTRON-GAS ON AU(111) SURFACES

Low temperature scanning tunneling microscopy study at similar to 30 K has revealed that the long-range ''herringbone'' reconstruction has a significant effect on the formation of standing waves in the Fermi-le vel surface-state electron density on an Au(111)-(23X root 3) reconstr ucted surface. The anisotropic standing-wave formation has been clearl y observed on terraces, on a monolayer island, and in a monolayer depr ession. The amplitudes of the standing waves were found to be enhanced along pairwise soliton walls. The observed anisotropy of the standing -wave formation suggests the important role of the herringbone-reconst ruction structure on the propagation and interference of surface-state electron waves. (C) 1997 American Vacuum Society.