1. Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign 1 , Urbana, Illinois 61801, USA
2. Center for Computing Research, Sandia National Laboratories 2 , Albuquerque, New Mexico 87123, USA
3. Department of Physics, University of Illinois at Urbana-Champaign 3 , Urbana, Illinois 61801, USA
4. Department of Applied Physics and Materials Science, California Institute of Technology 4 , Pasadena, California 91125, USA
5. Centro de Ciências Naturais e Humanas, Universidade Federal do ABC-UFABC 5 , Santo André, São Paulo 09210-580, Brazil
6. Department of Mechanical Engineering, Carnegie Mellon University 6 , Pittsburgh, Pennsylvania 15213, USA
7. Department of Physics and Astronomy, Rutgers University 7 , Piscataway, New Jersey 08854, USA
8. Laboratory of Atomic and Solid State Physics, Cornell University 8 , Ithaca, New York 14853, USA
9. Millenium Management 9 , New York, New York 10022, USA
10. Dynata 10 , Plano, Texas 75024, USA