1. Materials
and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama, 226-8503, Japan
2. Quantum Beam Science Center, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148, Japan
3. Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
4. Department
of Complexity Science and Engineering, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
5. National Institute of Advanced Industrial Science and Technology, Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
6. Department
of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima, Tokyo 171-8588, Japan
7. Peter Grünberg Institut, Forschungszentrum Jülich and JARA, Jülich 52425, Germany
8. Quantum
Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
9. Institute
for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
10. Institute
of Engineering Innovation, University of Tokyo, Bunkyo, Tokyo 113-8656, Japan