1. Institute for Integrative Nanosciences; Leibniz Institute for Solid State and Materials Research IFW Dresden; Helmholtzstraße 20 01069 Dresden Germany
2. Material Systems for Nanoelectronics; Technische Universität Chemnitz; Reichenhainer Straße 70 09107 Chemnitz Germany
3. Center for Advancing Electronics Dresden; Dresden University of Technology; Würzburger Straße 46 01187 Dresden Germany