1. Research Center for Computational Design of Advanced Functional Materials (CD-FMat), National Institute of Advanced Industrial Science and Technology (AIST), Central 2-1, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
2. Mathematics for Advanced Materials─OIL, National Institute of Advanced Industrial Science and Technology (AIST), Sendai, Miyagi 980-8577, Japan