1. Department of Physics, Faculty of Basic and Applied Sciences, International Islamic University, Islamabad, Pakistan
2. National Centre for Physics (NCP) at QAU Campus, Shahdra Valley Road, Islamabad 44000, Pakistan
3. Department of Physics, Quaid-e-Azam University (QAU), Islamabad, Pakistan
4. Instituto de Fisica “Gleb Wataghin,” Universidade Estadual de Campinas, Unicamp 13083-970, Campinas, Sao Paulo, Brasil