1. Department of Physics, Federal University of Amazonas, Manaus, Brazil
2. Department of Physics, University of North Texas, Denton, TX 76203, USA
3. Department of Physics and Astronomy, University of Southern California, Los Angeles, CA 90007, USA
4. Department of Physics and Science of Advanced Material Program, Central Michigan University, Mt. Pleasant, MI 48859, USA
5. Center for Materials Genomics, Duke University, Durham, NC 27708, USA
6. Santa Fe Institute, Santa Fe, NM 87506, USA