Origin of low-energy excitations in charge-ordered manganites E. Zhukova, B. Gorshunov, T. Zhang, D. Wu, A. S. Prokhorov, V. I. Torgashev, E. G. Maksimov and M. Dressel EPL, 90 1 (2010) 17005 Published online: 05 May 2010 DOI: 10.1209/0295-5075/90/17005