作者机构:State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China
相关基金:Project supported by the National Natural Science Foundation of China (Grant Nos 10434020, 10821062 and 10804004), the State Key Development Program for Basic Research of China (Grant Nos 2007CB307001 and 2009CB930504) and the Rescarch Fund for the Doctoral Program of Higher Education of China (Grant No 200800011023).