1. Ernst Ruska‐Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute Forschungszentrum Jülich GmbH Jülich 52425 Germany
2. Peter Grünberg Institute and Institute for Advanced Simulation Forschungszentrum Jülich GmbH and JARA Jülich 52425 Germany
3. Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement Ministry of Education School of Physics Beijing Institute of Technology Beijing 100081 China
4. International Iberian Nanotechnology Laboratory (INL) Braga 4715‐330 Portugal
5. State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 China