1. Department of Physics, University of Science & Technology Meghalaya, Ri-Bhoi, Meghalaya, India
2. Laboratory of Theoretical and Applied Physics, Echahid Cheikh Larbi Tebessi University, Tebessa, Algeria
3. Secretaria da Educaç ao do Ceará (SEDUC), Coordenadoria Regional de Desenvolvimento da Educaç ao (CREDE 9), Horizonte, Ceará, Brazil