Cliangchun Institu te of Physics Academia Sinica Changchun 130021;
Cliangchun Institu te of Physics Academia Sinica Changchun 130021;
Cliangchun Institu te of Physics Academia Sinica Changchun 130021;
Cliangchun Institu te of Physics Academia Sinica Changchun 130021;
Cliangchun Institu te of Physics Academia Sinica Changchun 130021;
Rese&rch Center Liaoning Normal University Dalian 116022;