1. Department of Physics; Central University of Tamil Nadu; Thiruvarur Tamil Nadu 610101 India
2. Simulation Center for Atomic and Nanoscale MATerials (SCANMAT); Central University of Tamil Nadu; Thiruvarur Tamil Nadu 610101 India
3. Department of Materials Science, Central; University of Tamil Nadu; Thiruvarur Tamil Nadu 610101 India
4. Center for Materials Science and Nanotechnology and Department of Chemistry; University of Oslo; Box 1033 Blindern 0315 Oslo Norway