1. Quantum Engineering Technology Labs, University of Bristol, Tyndall Avenue, Bristol BS8 1FD, United Kingdom
2. Hitachi Cambridge Laboratory, J. J. Thomson Ave., Cambridge CB3 0HE, United Kingdom
3. University Grenoble Alpes, CEA, INAC-MEM, 38000 Grenoble, France
4. Materials Science Factory, Instituto de Ciencia de Materiales de Madrid, ICMM-CSIC, Cantoblanco, E-28049 Madrid, Spain
5. Cavendish Laboratory, University of Cambridge, J. J. Thomson Ave., Cambridge CB3 0HE, United Kingdom
6. CEA/LETI-MINATEC, CEA-Grenoble, 38000 Grenoble, France