1. Department
of Physics, Xiamen University, Xiamen 361005, China
2. State Key Laboratory of Physical Chemistry
of Solid Surfaces and Department of Chemistry, College of Chemistry
and Chemical Engineering, Xiamen University, Xiamen 361005, China
3. Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
4. Institute for Complex Adaptive Matter, University of California, Davis, California 95616, United States