Optical Investigations of La_{7/8}Sr_{1/8}MnO_3

Abstract

We investigated temperature dependent optical conductivity spectra of La_{7/8}Sr_{1/8}MnO_3. Its phonon bending mode starts to be splitted near a structural phase transition temperature. With further cooling, strength of a mid-infrared small polaron peak, which is located at 0.4 eV, becomes increased. These temperature dependent changes in the phonon spectra and the polaron absorption peaks were explained by a phase separation and a percolation-type transition.

Revtex 12 pages, 5 figures, Submitted to Phys. Rev. B

References in corpus (3)

• Phase Separation in Electronic Models for Manganites
• Polaron Absorption in a Perovskite Manganite La0.7Ca0.3MnO3
• Interplay of charge and orbital ordering in manganese perovskites

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• Melting of Charge/Orbital Ordered States in Nd${}_{1/2}$Sr${}_{1/2}$MnO${}_3$: Temperature and Magnetic Field Dependent Optical Studies
• Photoinduced IR absorption in (La(1-x)Sr(x)Mn)(1-δ)O3: changes of the anti-Jahn-Teller polaron binding energy with doping
• Isotropic Kink and Quasiparticle Excitations in the Three-Dimensional Perovskite Manganite La${}_{0.6}$Sr${}_{0.4}$MnO${}_3$
• Effect of Mn substitution by Ga on the optical properties of a metallic manganite
• Observation of Colossal Terahertz Magnetoresistance and Magnetocapacitance in a Perovskite Manganite
• Dynamic conductivity of semiconducting manganites approaching the metal-insulator transition
• Oxygen isotope effect and phase separation in the optical conductivity of (La${}_{0.5}$Pr${}_{0.5}$)${}_{0.7}$Ca${}_{0.3}$MnO${}_3$ thin films