1. Laboratory of Computational Science and Modeling, Institute des Materiaux, Ecole polytechnique fédérale de Lausanne, CH-1015 Lausanne, Switzerland
2. Thomas Young Centre and Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
3. Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Galleria 2, Via Cantonale 2c, CH-6928 Manno, Switzerland
4. Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy