Institution: | 1. Phone: +81‐78‐435‐2478, Fax: +81‐78‐435‐2539;2. Department of Physics, Faculty of Science and Engineering, Konan University Okamoto 8‐9‐1, Higashi Nada‐ku, Kobe, Hyogo 658‐8501, Japan;3. Department of Physics, Faculty of Science, Osaka University Machikaneyama 1‐1, Toyonaka, Osaka 560‐0043, Japan;4. Nanotechnology Research Institute, Advanced Industrial Science and Technology AIST Tsukuba Central, Tsukuba, Ibaraki 305‐8568, Japan |