Affiliation: | 1. Department of Physics, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur (Dt), 522 502, A.P, India;2. Department of Applied Physics, Delhi Technological University, Bawana Road, New Delhi, 110 042, India;1. Department of Physics, Sikkim University, 6th Mile Samdur, East Sikkim, 737102, India;2. Department of Chemistry, Sikkim University, 6th Mile Samdur, East Sikkim, 737102, India |