1. Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 P. R. China
2. State Key Laboratory of Superhard Materials College of Physics Jilin University Changchun 130012 P. R. China
3. Graduate School of Life Sciences Ritsumeikan University Kusatsu Shiga 525-8577 Japan
4. Faculty of Bioscience Nagahama Institute of Bio-Science and Technology Nagahama Shiga 526-0829 Japan