1. Department of Basic Science and Humanities Institute of Engineering & Management Salt Lake Electronics Complex, Sector V, Salt Lake Kolkata 700091 India
2. Department of Condensed Matter and Materials Physics S. N. Bose National Centre for Basic Sciences Block JD, Sector III, Salt Lake Kolkata 700106 India
3. University of Engineering & Management University Area, Plot No. III, B/5, New Town Road, Action Area III, Newtown Kolkata 700160 India