Affiliation: | 1. Center for Computational Materials Science, Department of Physics, University of Malakand, Chakdara, Pakistan;2. Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia;3. Department of Physics, Faculty of Science, Port Said University, Port Said, Egypt;4. Gomal University, Dera Ismail Khan, Pakistan |