Dimensional Crossover driven by Magnetic Ordering in Optical Conductivity of Pr1/2Sr1/2MnO3
Abstract
We investigated optical properties of Pr0.5Sr0.5MnO3, 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 Nd0.5Sr0.5MnO3, which has the CE-type antiferromagnetic charge ordering, we showed that optical properties of Pr0.5Sr0.5MnO3 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.
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