-resolved electronic structure of quasi-free 2-dimensional clusters
Institut für Experimentelle und
Angewandte Physik, Universität Kiel D-24118 Kiel, Germany
Accepted: 25 August 2000
Employing van der Waals epitaxy we grow quasi-free 2-dimensional clusters of layered materials. The weak coupling between the layers enables the clusters to reveal their intrinsic properties undisturbed by the underlying substrate. Their orientations being well ordered allow -resolved measurements. Applying angle-resolved photoemission in combination with scanning tunneling microscopy to the same samples allows to study the evolution of the electronic structure with increasing cluster size. For 2D clusters grown on we demonstrate that dispersion already occurs for cluster diameters of ≈ 100 nm.
PACS: 71.24.+q – Electronic structure of clusters and nanoparticles / 61.46.+w – Clusters, nanoparticles, and nanocrystalline materials / 73.20.Dx – Electron states in low-dimensional structures (superlattices, quantum well structures and multilayers)
© EDP Sciences, 2000