1. Department of Physics and Electronics; Osaka Prefecture University; 1-1 Gakuen-cho Naka-ku Sakai 599-8531 Japan
2. The Research Institute for Molecular Electronic Devices; Osaka Prefecture University; 1-1 Gakuen-cho Naka-ku Sakai 599-8531 Japan
3. Electronics Materials Development Project; Teijin Limited; 4-3-2 Asahigaoka, Hino Tokyo 191-8512 Japan
4. Department of Applied Chemistry; Hiroshima University; 1-3-2 Kagamiyama Higashi-Hiroshima Hiroshima 739-8527 Japan
5. Center for Emergent Matter Science; RIKEN; 2-1 Hirosawa Wako Saitama 351-0198 Japan