1. Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education and International Center for Dielectric Research School of Electronic and Information Engineering Xi'an Jiaotong University Xi'an 710049 China
2. Center for Spintronics and Quantum System State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi'an Jiaotong University Xi'an 710049 China
3. State Key Laboratory of New Ceramics and Fine Processing and School of Materials Science and Engineering Tsinghua University Beijing 100084 China
4. Department of Chemistry and 4D LABS Simon Fraser University Burnaby British Columbia V5A 1S5 Canada
5. Materials Science Division Argonne National Laboratory 9700 Cass Avenue Lemont IL 60439 USA
6. Institute for Molecular Engineering The University of Chicago 5640 South Ellis Avenue Chicago IL 60637 USA
7. State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing 100084 China