1. Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, China
2. Institute of Physics, Chinese Academy of Sciences, Beijing, China
3. Departament de Física de la Matèria Condensada, Universitat de Barcelona, 08028 Barcelona, Spain
4. Dipartimento di Fisica, Sapienza Università di Roma, Piazzale A. Moro 5, I-00185 Roma, Italy
5. Universitat de Barcelona Institute of Complex Systems (UBICS), Universitat de Barcelona, Barcelona, Spain
6. Institut de Nanociència i Nanotecnologia, Universitat de Barcelona, Barcelona, Spain
7. CECAM, Centre Européen de Calcul Atomique et Moléculaire, École Polytechnique Fédérale de Lasuanne (EPFL), Batochime, Avenue Forel 2, 1015 Lausanne, Switzerland