Institution: | 1.Department of Physics, International Islamic University, 44000, Islamabad, Pakistan ;2.Department of Physics, Riphah International University, 44000, Islamabad, Pakistan ;3.Department of Physics, COMSATS University Islamabad, Pakistan and Institute for Physical Problem BSU, Baku, Azerbaijan ;4.Department of Physics, Abdul Wali Khan University Mardan, 23200, Mardan, Pakistan ; |