1. Applied Theoretical Physics-Computational Physics, Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder Strasse 3, D-79104 Freiburg, Germany
2. Departamento de Física Aplicada I, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos S/N, E-29071 Málaga, Spain
3. Research Group for Simulations of Energy Materials, Helmholtz-Zentrum Berlin, D-14109 Berlin, Germany