1. Materials Research Department, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
2. Stuttgart Center for Electron Microscopy, MPI for Intelligent Systems, Stuttgart, Germany
3. CST-Computer Simulation Technology AG, Darmstadt, Germany
4. Department of Materials- and Geo-Sciences, Technische Universität Darmstadt, Darmstadt, Germany