1. National High Magnetic Field Laboratory, 1800 E. Paul Dirac Dr., Tallahassee, Florida 32310, United States
2. Department of Physics, Florida State University, 77 Chieftan Way, Tallahassee, Florida 32306, United States
3. Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
4. Institute for Condensed Matter and Complex Systems, School of Physics and Astronomy, The University of Edinburgh, Edinburgh EH9 3FD, U.K.
5. Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798, United States
6. Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
7. Higgs Centre for Theoretical Physics, The University of Edinburgh, Edinburgh EH9 3FD, U.K.