1. Quantum Matter Group, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
2. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
3. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
4. Department of Applied Physics, School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA
5. Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
6. Fritz Haber Institute, Max Planck Society, 14195 Berlin, Germany
7. Computational Research Division and Center for Advanced Mathematics for Energy Research Application, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
8. Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634, USA
9. Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
10. Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, USA