1. RIKEN Center for
Emergent Matter Science, Wako 351-0198, Japan
2. Department
of Applied Physics and Quantum-Phase Electronics Center, The University of Tokyo, Tokyo 113-8656, Japan
3. Zernike
Institute for Advanced Materials, University of Groningen, 9747 AG Groningen, The Netherlands
4. The
Institute of Scientific and Industrial Research, Osaka University, Osaka 067-0047, Japan
5. Max Planck Institute
for Solid State Research, 70569 Stuttgart, Germany
6. Japan Synchrotron Radiation
Research Institute (JASRI), Hyogo 679-5198, Japan
7. School
of Science and Technology, Kwansei Gakuin University, Hyogo 669-1337, Japan
8. Department
of Electrical Engineering, Kyushu Sangyo University, Fukuoka 813-8503, Japan
9. Institute
for Materials Research, Tohoku University, Sendai 980-8577, Japan