Work

One-dimensional versus two-dimensional electronic states in vicinal surfaces

Year: 2005

Type: article

Abstract: Vicinal surfaces with periodic arrays of steps are among the simplest lateral nanostructures. In particular, noble metal surfaces vicinal to the (1 1 1) plane are excellent test systems to explore the basic electronic properties in one-dimensional superlattices by means of angular photoemission. These surfaces are characterized by strong emissions from free-electron-like surface states that scatter at step edges. Thereby, the two-dimensional surface state displays superlattice band folding and, depending on the step lattice constant d , it splits into one-dimensional quantum well levels. Here we use high-resolution, angle-resolved photoemission to analyse surface states in a variety of samples, in trying to illustrate the changes in surface state bands as a function of d .

Source: New Journal of Physics

DOI: 10.1088/1367-2630/7/1/101

Authors: J E Ortega, M Ruiz-Osés, J Cordón, A Mugarza, J Kuntze, F Schiller