1. Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
2. Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan
3. Forefront Research Center, Osaka University, Toyonaka, Osaka 560-0043, Japan
4. Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
5. Van der Waals–Zeeman Institute, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
6. Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan