Lin, Zhong
School of Physics, Peking University, Beijing 100871, PR China; Wang, Changsheng
School of Physics, Peking University, Beijing 100871, PR China; Yang, Yunbo
School of Physics, Peking University, Beijing 100871, PR China; Yang, Yingchang
School of Physics, Peking University, Beijing 100871, PR China; Du, Honglin
School of Physics, Peking University, Beijing 100871, PR China; Yang, Jinbo
School of Physics, Peking University, Beijing 100871, PR China
State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, PR China; Han, Jingzhi
School of Physics, Peking University, Beijing 100871, PR China
hanjingzhi@pku.edu.cn; Liu, Shunquan
School of Physics, Peking University, Beijing 100871, PR China; Xing, Meiying
School of Physics, Peking University, Beijing 100871, PR China
(2015-01-15)