Affiliation: | 1. Division of Solid State Physics/The Nanometer Structure Consortium at Lund University (nmC@LU), P.O. Box 118, S-221 00, Lund, Sweden 2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603-146, Beijing, 100190, China 3. Department of Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, Peking University, Beijing, 100871, China
|