作者机构:[1]Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China, [2]College of Physics & Communication Electronics, Jiangxi Normal University, Nanchang 330022,China
相关基金:Project supported by the National Natural Science Foundation of China (Grant Nos 10775097 and 10874174), and the Research Foundation of the Education Department of Jiangxi Province of China.