Dimensional Crossover driven by Magnetic Ordering in Optical Conductivity of Pr_{1/2}Sr_{1/2}MnO_3

Abstract

We investigated optical properties of Pr_{0.5}Sr_{0.5}MnO_3, which has the A-type antiferromagnetic ordering at a low temperature. We found that T- dependence of spectral weight transfer shows a clear correlation with the magnetic phase transition. In comparison with the optical conductivity results of Nd_{0.5}Sr_{0.5}MnO_3, which has the CE-type antiferromagnetic charge ordering, we showed that optical properties of Pr_{0.5}Sr_{0.5}MnO_3 near the Neel temperature could be explained by a crossover from 3D to 2D metals. Details of spectral weight changes are consistent with the polaron picture.

11 pages, 4 figures, submitted to PRL at June 1

References in corpus (6)

• Optical Conductivity of Manganites: Crossover from Jahn-Teller Small Polaron to Coherent Transport in the Ferromagnetic State
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• Polaron Absorption in a Perovskite Manganite La0.7Ca0.3MnO3
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• A Scaling Behavior of Spectral Weight Changes in Perovskite Manganites La_{0.7-y}Pr_{y}Ca_{0.3}MnO_3

Cited by in corpus (2)

• Electrodynamics of Correlated Electron Materials
• Infrared absorption study of charge ordered $La{}_{0.5}Ca{}_{0.5-x}S{r}_{x}Mn{O}_3$ $(0.1\le x\le 0.5$