1. Department of Physics, Kyoto Sangyo University, Kyoto 603-8555, Japan
2. Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
3. Quemix Inc., Chuo, Tokyo 103-0027, Japan
4. Quantum Materials and Applications Research Center, National Institutes for Quantum Science and Technology (QST), Meguro, Tokyo 152-8550, Japan