1. Department of Physics, The University of Texas at El Paso, El Paso, Texas 79968, USA
2. Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, Texas 79968, USA
3. Critical Materials Institute, Ames Laboratory, Ames, Iowa 50011, USA
4. Micron School of Materials Science and Engineering, Boise State University, 1910 University Drive, Boise, Idaho 83725, USA