1. First-Principles
Simulation Group, Nano-Theory Field, International Center for Materials
Nanoarchitectonics (WPI-MANA), National Institute for Materials Science
(NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
2. Department
of Computer Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
3. CREST, Japan Science
and Technology Agency, 4-1-8 Hon-cho, Kawaguchi, Saitama 332-0012, Japan
4. Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, U.K.
5. WPI-MANA, National
Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
6. London Centre for Nanotechnology, University College London, 17-19 Gordon Street, London WC1H 0AH, U.K.