Large elasto-optic effect and reversible electrochromism in multiferroic BiFeO3

D. Sando, Y. Yang, E. Bousquet, C. Carrétéro, V. Garcia, S. Fusil, D. Dolfi, A. Barthélémy, Ph. Ghosez, L. Bellaiche and M. Bibes, Nature Comm. 7, 10718 (2016).