1. Department of Physics, Savitribai Phule Pune University, Pune 411007, Maharashtra, India
2. Defence Metallurgical Research Laboratory, Hyderabad 500058, India
3. School of Physics, Indian Institute of Science Education and Research, Thiruvananthapuram 695551, Kerala, India
4. Department of Chemistry, Indian Institute of Science Education and Research, Pune, Dr. Homi Bhabha Road, Pune 411008, India
5. Center for Advanced Materials Research (CMR), University of Texas at El Paso, El Paso, Texas 79968, USA