Affiliation: | ZHANG Binglin WANG Xiaoping HE JintianLIU Dajun WANG Jian'en(Department of Physics and Henan Fundamental and Applied Science Research Institute, Zhengzhou University,Zhengzhou 450052, China)and Howard R. Shanks(Microelectronics Research Center, Iowa State University, Ames, IA 50010, USA) |