1. Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur 572 103, India
2. Department of Physics, National Dong Hwa University, Hualien 97401, Taiwan
3. Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan
4. Jain Deemed to be University, Bengaluru 562 112, India
5. School of Biological Sciences, Sri Balaji Vidyapeeth (Deemed to be University), Puducherry 607402, India
6. Department of Physics, Government College, Kalaburagi 585105, India