Hourglass dispersion in overdoped single-layered manganites

Abstract

The excitation spectrum in single-layered Nd(0.33)Sr(1.67)MnO4 and Pr(0.33)Ca(1.67)MnO4 resembles the hourglass-like excitation dispersion seen in various cuprates superconductors. However, our spin-wave dispersion in Pr(0.33)Ca(1.67)MnO4, which exhibits a large correlation length of the magnetic order, showing outward-dispersing branches starting from the incommensurate zone-centres. The magnetic correlation length is identified as the decisive parameter to suppress this branches and generating an correct hourglass shape.

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• Disorder, cluster spin glass, and hour-glass spectra in striped magnetic insulators
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• Spin-wave dispersion and magnon chirality in multiferroic TbMnO3
• Energy-dependent crossover from anisotropic to isotropic magnetic dispersion in lightly-doped La1.96Sr0.04CuO4
• The Hour-Glass Magnetic Spectrum Arising from a Striped, Cluster Spin Glass Ground State in La1.75Sr0.25CoO4
• Magnetic excitations of the charge stripe electrons below half doping in La(2-x)Sr(x)NiO4, x = 0.45 and x = 0.4
• Preserving orbital order in a layered manganite by ultrafast hybridized band excitation
• Development of the Magnetic Excitations of Charge-Stripe Ordered La(2-x)Sr(x)NiO(4) on Doping Towards Checkerboard Charge Order