1. CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering University of Science and Technology of China 96 Jinzhai Road Hefei 230026 Anhui P. R. China
2. Synergetic Innovation Center of Quantum Information & Quantum Physics University of Science and Technology of China Hefei Anhui 230026 P. R. China
3. Hefei National Laboratory of Physical Science at the Microscale University of Science and Technology of China Hefei 230026 Anhui P. R. China