1. University Grenoble Alpes, CEA, LETI, F38000 Grenoble, France
2. University Grenoble Alpes, CEA, LITEN, F38000 Grenoble, France
3. University Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, BP166, 38042 Grenoble, Cedex 09, France
4. University Bordeaux, IMS-CNRS, UMR 5218, Bordeaux INP, ENSCBP, F33405 Talence, France