Jungiusstr. 11, Hörsaal AP
SFB 668 - Kolloquium
C. Carbone (U Trieste):
Looking into a metal film : interface and surface effects on quantum confined electrons
Very thin metal films find a wide range of applications in today nanotechnologies. Progresses in film growth make available layer materials approaching an ideal two-dimensional character, with sharp interfaces and atomically uniform thicknesses. In line with simple quantum mechanics, finite size effects give rise to series of discrete electronic levels, which finely tune chemical reactivity, superconductor temperature, and magnetic coupling. A deeper understanding and control of the film properties often calls for a close description of electron interactions at the film boundaries. Selected studies by photoelectron spectroscopy will illustrate various cases of interplay between interface, surface, and quantum confinement effects of different nature and complexity. In particular, the effect on the film electronic structure of the substrate band and lattice mismatch, and of exchange and Rashba interactions, will be discussed together with their implications for the film physical and functional properties.