[1] Jawaharlal Nehru Ctr Adv Sci Res, Chem & Phys Mat Unit, Bangalore 560064, Karnataka, India
[2] Jawaharlal Nehru Ctr Adv Sci Res, CSIR, Ctr Excellence Chem, Bangalore 560064, Karnataka, India
[3] Tata Inst Fundamental Res, Dept Condensed Matter Phys & Mat Sci, Bombay 400005, Maharashtra, India
[4] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India
[5] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India