1Micro/Nano Fabrication Hub, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Yoshida-Honmachi, Sakyo, Kyoto 606-8501 (Japan)
2Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
3Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
4Institute of Quantum Science, Nihon University, Tokyo 101-8308 (Japan)
5Beamline BL15XU, SPring‐8, NIMS‐branch office Hyogo 679‐5148 (Japan)
6Department of Physics, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan
7Institute for Integrated Cell-Material Sciences, Kyoto University, Kyoto, 606-8501, Japan