1. Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey, 123 Bevier Road, Piscataway, New Jersey 08854, United States
2. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3. Department of Physics and Astronomy, Rutgers, the State University of New Jersey, 136 Frelinghuysen Road, Piscataway, New Jersey, 08854, United States
4. Department of Physics, Chungnam National University, Daejeon 34134, South Korea
5. Department of Physics, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
6. Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
7. Lamont Doherty Earth Observatory, Columbia University, Palisades, New York 10964, United States