1. Department of Electrical and Electronic Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
2. Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
3. Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany.
4. Soft Matter Physics (SOMAP), Johannes Kepler University Linz, A-4040 Linz, Austria.
5. Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505 Japan.
6. Institute for Nano Quantum Information Electronics (INQIE), The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505 Japan.