1. Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin, Departamento de Física Aplicada, Campinas, São Paulo 13083-859, Brazil
2. University of Brasília, Faculty of Technology, Department of Electrical Engineering, Brasília 70910-900, Brazil
3. University of Brasília, Institute of Physics, Brasília 70910-900, Brazil
4. Computational Materials Laboratory, LCCMat, University of Brasília, Brasília 70910-900, Brazil
5. Department of Mechanical and Civil Engineering, California Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, United States