1. Department of Physics, University of Florida, Gainesville, FL 32611‐8440, USA
2. National Synchrotron Light Source, BNL, Upton, NY 11973, USA
3. Ecole Polytechnique Fédérale, 1015 Lausanne, Switzerland
4. Department of Physics, SUNY, Stony Brook, NY 11794, USA
5. National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32306, USA
6. Department of Physics, University of Texas, Austin, TX 78712, USA
7. Department of Physics and Materials Research Laboratory, University of Illinois at Urbana‐Champaign, Urbana, IL 61801, USA
8. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA