1. Department of Applied Physics, Aalto University, Espoo, Finland
2. Department of Physics, Chalmers University of Technology, Gothenburg, Sweden
3. Simune Atomistics S.L., Donostia-San Sebastián, Spain
4. Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Medellín, Colombia
5. Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland