Institution: | (Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190;School of Physics,Harbin Institute of Technology,Harbin 150001;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190;Songshan Lake Materials Laboratory,Dongguan 523808;Institute for Solid State Physics,University of Tokyo,Kashiwa,Chiba 277-8581,Japan) |