1. Department of Electronics and Communication Engineering, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, India
2. Department of Electrical Engineering and Computer Science, University of Missouri, Columbia, MO 65211, USA
3. Semiconducting Oxide Materials, Nanostructures and Tailored Heterojunction (SOMNaTH) Lab, Department of Physics, Indian Institute of Technology Madras, Chennai, India, 600036
4. Department of Physics, SRM Institute of Science and Technology, Ramapuram Campus, Chennai, India, 600089