1. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2. Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague, Technicka 2, 16627 Prague 6, Czech Republic
3. National Centre for Advanced Tribology (nCATS), Department of Mechanical Engineering, University of Southampton, Highfield, SO17 1BJ Southampton, United Kingdom
4. CNR-IOM, Consiglio Nazionale delle Ricerche - Istituto Officina dei Materiali, c/o SISSA, 34136 Trieste, Italy
5. Department of Electronics and Nanoengineering, Aalto University, Tietotie 3, FI-02150 Aalto, Finland
6. Institute of Physics, Czech Academy of Sciences, Na Slovance 2, 18221 Prague 8, Czech Republic
7. Mechanical Engineering, Helmut Schmidt University, Hamburg,22043, Germany
8. College of Semiconductors (College of Integrated Circuits), Hunan University, Changsha 410082, China
9. Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
10. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China