Terahertz spectroscopy of low-energy excitations in charge-ordered La0.25Ca0.75MnO3

T. Zhang,1 E. Zhukova,1,2 B. Gorshunov,1,2 D. Wu,1 A. S. Prokhorov,2 V. I. Torgashev,3 E. G. Maksimov,4 and M. Dressel1 11. Physikalisches Institut, Universitat Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany 2A.M. Prokhorov Institute of General Physics, Russian Academy of Sciences, Vavilov Str. 38, 119991 Moscow, Russia 3Faculty of Physics, Rostov State University, Zorge Str. 5, 344090 Rostov-on-Don, Russia 4Lebedev Physics Institute, Russian Academy of Sciences, Leninsky Prospect, 53, 119991 Moscow, Russia Received 20 January 2010; revised manuscript received 19 February 2010; published 30 March 2010

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