1. Quantum Solid-State Physics (QSP), KU Leuven, Celestijnenlaan 200D, Leuven 3001, Belgium
2. imec, Kapeldreef 75, Leuven 3001, Belgium
3. Institut Laue-Langevin, 71 Avenue des Martyrs, Grenoble Cedex 9 38042, France
4. Department of Civil, Environmental, Architectural Engineering and Mathematics (DICATAM), Università di Brescia , Via Branze, Brescia 43-25123, Italy
5. National Research Council−Institute for Microelectronics and Microsystems (CNR-IMM), Via Gobetti, Bologna 101-40129, Italy
6. Department of Materials and Earth Sciences, Technical University of Darmstadt, Darmstadt 64287, Germany
7. Deutsches Elektronen Synchrotron DESY, Notkestr. 85, Hamburg 22607, Germany