1. School of Sciences, P. P. Savani University, NH-8, GETCO, Near Biltech, Kosamba, Surat 394125, Gujarat, India
2. Solid State Physics Division, Bhabha Atomic Research Centre (BARC), Mumbai 400085, Maharashtra, India
3. Biomacromolecular Systems and Processes, Institute of Biological Information Processing, Forschungszentrum Jülich, Jülich 52428, Germany