1. Centre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Saclay, 91120 Palaiseau, France
2. Department of Applied Physics, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
3. Laboratoire de Physique des Solides, CNRS, Université Paris-Saclay, 91405 Orsay Cedex, France
4. Istituto Nazionale di Ricerca Metrologica, Strada delle Cacce 91, 10135 Torino, Italy
5. Departamento de Física Aplicada, Universidad de Salamanca, Plaza de la Merced s/n., 37008 Salamanca, Spain
6. Singulus Technology AG, Hanauer Landstrasse 103, 63796 Kahl am Main, Germany