1. Department of Physics, Government College University 1 , Allama Iqbal Road, Faisalabad 38000, Pakistan
2. Physics Division, Pakistan Institute of Nuclear Science and Technology (PINSTECH) 2 , Nilore, Islamabad 45650, Pakistan
3. State Key Laboratory of Precision Spectroscopy, Quantum Institute for Light and Atoms, Department of Physics, East China Normal University 3 , Shanghai 200062, People’s Republic of China
4. Graphene and Advanced 2D Materials Research Group (GAMRG), School of Engineering and Technology, Sunway University 4 , No. 5, Jalan Universiti, Bandar Sunway, 47500 Petaling Jaya, Selangor, Malaysia
5. Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas 5 , Campinas, SP, Brazil