作者机构:[1]School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, Heilong/iang 150001, China, [2]Department of Physics, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China, [3]Institute of Atomic and Molecular Physics, Jilin University, Changchun, Jilin 130012, China, [4]Department of Physics and Electronics Information Engineering, Hezhou University, Hezhou, Guangxi 542800, China
相关基金:This work was supported by the National Natural Science Foundation of China (Nos. 21003033, 11004076, 10774034 and 21173063), the China Post- doctoral Science Foundation (No. 20100481006), the Guangxi Natural Science Foundation (No. 2012GXNSFBA053012), and the Research Foundation of Education Bureau of Guangxi (No. 200103YB 140).