1. Department of Physics, School of Applied Sciences, KIIT, Deemed to be University, Bhubaneswar 751024, India
2. Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
3. Department of Chemistry, School of Physical and Chemical Sciences, Central University of South Bihar, SH-7, Gaya-Panchanpur Road, Gaya 824236, India