1. Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
2. Theoretical Physics Group, Department of Physics, University of Port Harcourt, Choba, Port Harcourt 500004, Nigeria
3. Western Caspian University, Baku 1001, Azerbaijan
4. Department of Physics, College of Science, Sultan Qaboos University, P. C. 123, Al-Khod, Muscat P.O. Box 36, Oman
5. Department of Physics, University of South Africa, Florida Campus, Johannesburg 1710, South Africa
6. Department of Physics, Akwa Ibom State University, Ikot Akpaden, P. M. B. 1167, Uyo 520221, Nigeria