1. Department of Physics, Tokyo Metropolitan University, Hachiouji 192-0397, Japan, Department of Chemistry, Nagoya University, Nagoya 464-8602, Japan, Research Center for Advanced Carbon Materials, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8562, Japan, Institute of Physics, Center for Computational Science, University of Tsukuba, Tennodai, Tsukuba 305-8571, Japan, Nanotechnology Research Institute, AIST, Tsukuba 305-8565, Japan, and CREST, Japan Science Technology...