1. School of Physics, Nankai University, Tianjin 300071, People's Republic of China
2. Department of Physics, Rawalpindi Women University, Rawalpindi 43600, Pakistan
3. Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, PR China
4. School of Materials Science and Engineering, Computational Centre for Molecular Science, Institute of New Energy Material Chemistry, Nankai University, Tianjin 300350, PR China
5. Department of Physics, University of Malakand, Chakdara, Dir (Lower), 18800, KP, Pakistan
6. Institute of Basic Sciences, Centre for Soft and Living Matter, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea