1. Photon Science Division, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
2. NSLS-II, Brookhaven National Laboratory, Upton, New York 11973, USA
3. Synchrotron Radiation Research Center, National Institutes for Quantum and Radiological Science and Technology, Sayo, Hyogo 679-5148, Japan
4. Beijing National Lab for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
5. Materials Research Lab at Songshan Lake, Dongguan 523808, China