1. Faculty
of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
2. Hokkaido Information University, 59-2 Nishinopporo, Ebetsu 069-0832, Japan
3. Center
for Crystal Science and Technology, University of Yamanashi, 7-32 Miyamae, Kofu 400-8511, Japan