1. Institute for Solid State Physics, The University of Tokyo 1 , Chiba 277-8581, Japan
2. Department of Physics, The University of Tokyo 2 , Tokyo 113-0033, Japan
3. Trans-scale Quantum Science Institute, The University of Tokyo 3 , Tokyo 113-0033, Japan
4. Department of Physics and Astronomy, Institute for Quantum Matter, Johns Hopkins University 4 , Baltimore, Maryland 21218, USA