1. Department of Physics, Savitribai Phule Pune University, Pune411007, Maharashtra, India
2. Department of Physics, Fergusson College (Autonomous), Pune411004, Maharashtra, India
3. Center for Advanced Materials Research (CMR), University of Texas at El Paso, El Paso, Texas79968, United States
4. Department of Mechanical Engineering, University of Texas at El Paso, El Paso, Texas79968, United States