Electrodynamics of Nd0.7Sr0.3MnO3 Single Crystal investigated by Optical Conductivity Analyses

Details Electrodynamics of Nd0.7Sr0.3MnO3 Single Crystal investigated by Optical Conductivity Analyses Electrodynamics of Nd0.7Sr0.3MnO3 Single Crystal investigated by Optical Conductivity Analyses

1999-04-13

arxiv.org/abs/cond-mat/9904173v1

Physics

Condensed Matter

Strongly Correlated Electrons

18 pages, 8 figures, submitted to PRB

Scientific paper

We investigated temperature dependent optical conductivity spectra of Nd0.7Sr0.3MnO3 single crystal. We found that polishing and surface scattering effects on the Nd0.7Sr0.3MnO3 crystal surfaces could significantly distort the optical responses, especially in the mid-infrared region. However, oxygen annealing and gold normalization processes seemed to remedy the distortions. We found that the spectral weight of Nd0.7Sr0.3MnO3 in the metallic state might be composed of a Drude carrier term and a strong incoherent mid-infrared absorptions. The temperature dependence of the spectral weight suggests that the electron-lattice coupling should be important in optical properties of colossal magnetoresistance manganites.

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