1. Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita, Osaka 565-0871, Japan, Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Materials Science and Engineering, University of California-Berkeley, Berkeley, California 94720, Department of Physics, National Tsing Hua University, 101 Section 2 Kuang Fu Road, Hsinchu 30013, Taiwan, Centre d’Investigació en Nanociència i...