[1] Birla Inst Technol & Sci BITS Pilani, Dept Chem, Pilani Campus, Pilani 333031, Rajasthan, India
[2] Bhabha Atom Res Ctr BARC Trombay, Solid State Phys Div, Mumbai 400085, Maharashtra, India
[3] Birla Inst Technol & Sci BITS Pilani, Dept Chem, Hyderabad Campus, Hyderabad 500078, Telangana, India