1. Department of Physics, Kyoto University, Kyoto 606-8502, Japan
2. RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
3. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
4. Laboratorium für Physikalische Chemie, ETH Zürich, 8093 Zürich, Switzerland
5. Institut für Kernphysik, Goethe-Universität, Max-von-Laue-Strasse 1, 60438 Frankfurt, Germany
6. Department of Physical Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
7. Technische Universität Wien, Institut für Photonik, Gußhausstraße 27-29, A-1040 Wien, Austria
8. School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People’s Republic of China
9. Japan Synchrotron Radiation Research Institute (JASRI), Sayo, Hyogo 679-5198, Japan
10. Theoretical Chemistry, Institute of Physical Chemistry, Heidelberg University, 69120 Heidelberg, Germany