Optical Investigations of Charge Gap in Orbital Ordered La1/2Sr3/2MnO4

Abstract

Temperature and polarization dependent electronic structure of La1/2Sr3/2MnO4 were investigated by optical conductivity analyses. With decreasing temperature, for E//ab, a broad mid-infrared (MIR) peak of La1/2Sr3/2MnO4 becomes narrower and moves to the higher frequency, while that of Nd1/2Sr3/2MnO4 nearly temperature independent. We showed that the MIR peak in La1/2Sr3/2MnO4 originates from orbital ordering associated with CE-type magnetic ordering and that the Jahn-Teller distortion has a significant influence on the width and the position of the MIR peak.

10 pages, 4 figures

Cited by in corpus (12)

• Structural and magnetic properties of the single-layer manganese oxide La{1-x}Sr{1+x}MnO4
• Spin, charge and orbital ordering in La0.5Sr1.5MnO4
• On charge and orbital ordering in La0.5Sr1.5MnO4
• Melting of Charge/Orbital Ordered States in Nd${}_{1/2}$Sr${}_{1/2}$MnO${}_3$: Temperature and Magnetic Field Dependent Optical Studies
• Ferromagnetic zigzag chains and properties of the charge ordered perovskite manganites
• In-plane anisotropy of the electronic structure for the charge/orbital-ordered state in half-doped manganite with layered structure
• Doped Manganites Beyond Conventional Double-Exchange Model
• Origin of the Optical Gap in Half-Doped Manganites
• Spin-orbital physics in the optical conductivity of quarter-filled manganites
• Jahn-Teller distortions and the magnetic order in the perovskite manganites
• Signatures of electronic polarons in La${}_{1-x}$Sr${}_{1+x}$MnO${}_4$ observed by electron energy-loss spectroscopy
• Momentum dependence in K-edge resonant inelastic x-ray scattering and its application to screening dynamics in CE-phase La${}_{0.5}$Sr${}_{1.5}$MnO${}_4$