Author:

Keywords:

Science & Technology, Physical Sciences, Physics, Condensed Matter, Physics, SCANNING-TUNNELING-MICROSCOPY, THIN-FILMS, SURFACE, AU(111), STM, 0204 Condensed Matter Physics, 0912 Materials Engineering, 1007 Nanotechnology, Fluids & Plasmas, 4016 Materials engineering, 4018 Nanotechnology, 5104 Condensed matter physics

Abstract:

We investigated the growth and the electronic properties of crystalline NaCl layers on Au(111) surfaces by means of cryogenic scanning tunneling microscopy and spectroscopy under ultra-high vacuum conditions. Deposition of NaCl on Au(111) at room temperature yields bilayer NaCl islands, which can be transformed into trilayer NaCl islands by post-annealing. Upon NaCl adsorption, the Au(111) Shockley surface state becomes an interface state (IS) at the NaCl/Au(111) interface. Using Fourier-transform images of maps of the local density of states, the energy versus wave vector dispersions of the IS and the Au(111) bulk states are determined. The dispersion of both states is found to depend strongly on the thickness of the adsorbed NaCl layer.