1. Department of Physics, Indian Institute of Science, Bangalore 560012, India
2. Soft Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
3. School of Liberal Studies, Azim Premji University, Bangalore 560100, India
4. SOLEIL Synchrotron, L’Orme des Merisiers, Saint-Aubin, BP48, 91192 Gif-sur-Yvette Cedex, France
5. Laboratoire de Physique des Solides, Unité Mixte de Recherche 8502 Centre National de la Recherche Scientifique, Université Paris-Sud 11, 91405 Orsay Cedex, France
6. Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata 700064, India