1. Innovative Devices R&D Center, Corporate Research and Development, Asahi Kasei Corporation, Fuji, Shizuoka 416-8501, Japan
2. Center for Integrated Research of Future Electronics, Institute of Materials Research and System for Sustainability, Nagoya University, Chikusa, Aichi 464-8601, Japan
3. Graduate School of Engineering, Nagoya University, Chikusa, Aichi 464-8603, Japan
4. Crystal IS, 70 Cohoes Avenue, Green Island, New York 12183, USA