1. Department
of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama 2-12-1, Meguro-ku, Tokyo 152-8552, Japan
2. Department
of Applied Physics, Okayama University of Science, Ridaicho 1-1, Okayama 700-0005, Japan
3. Emergent
Molecular Function Research Group, RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
4. ACT-C, JST, Honcho, Kawaguchi,
Saitama 332-0012, Japan