Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China, Key Lab of Supramolecular Structure and Materials, Jilin University, Changchun 130023, China, and Empa, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland(2010-07-13時点)
