1. School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Jatni 752050, Odisha, India
2. Institute of Physics, Bhubaneswar 751005, Odisha, India
3. National Aluminium Co. Ltd., Bhubaneswar 751013, Odisha, India
4. Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, USA