1. Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
2. Center for Applied Research in Electronics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
3. Condensed Matter Theory and Computational Lab, Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India
4. Center for Atomistic Modelling and Materials Design, Indian Institute of Technology Madras, Chennai 600036, India
5. Department of Physics & Astronomy, University of Missouri, Columbia, Missouri 65211, United States
6. Department of Physics, University of Gothenburg, Gothenburg 412 96, Sweden
7. Surface Physics & Material Science Division, Saha Institute of Nuclear Physics, A CI of Homi Bhabha National Institute, 1/AF Bidhannagar, Kolkata 700064, India