1. Université Grenoble Alpes, CEA, LETI, 38000 Grenoble, France
2. Luxembourg Institute of Science and Technology, Material Research and Technology Department, 41 Rue du Brill, L-4422 Belvaux, Luxembourg
3. SPEC, CEA, CNRS, Université Paris Saclay, F-91191 Gif-sur-Yvette, France