Spin dynamics of stripes

Abstract

The spin dynamics of stripes in high-temperature superconductors and related compounds is studied in the framework of a spin-wave theory for a simple spin-only model. The magnon dispersion relation and the magnetic structure factor are calculated for diagonal and vertical stripes. Acoustical as well as optical bands are included in the analysis. The incommensurability and the $\pi$ resonance appear as complementary features of the band structure at different energy scales. The dependence of spin-wave velocities and resonance frequencies on the stripe spacing and coupling is calculated. At low doping, the resonance frequency is found to scale roughly inversely proportional to the stripe spacing. The favorable comparison of the results with experimental data suggests that the spin-only model provides a suitable and simple basis for calculating and understanding the spin dynamics of stripes.

11 page, 10 figures, pdf version with high-res.pics at http://www.thp.uni-koeln.de/~sts/

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Cited by in corpus (47)

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• Stripe order, depinning, and fluctuations in La${}_{1.875}$Ba${}_{0.125}$CuO${}_4$ and La${}_{1.875}$Ba${}_{0.075}$Sr${}_{0.050}$CuO${}_4$
• Two-Dimensional Geometry of Spin Excitations in the High Temperature Superconductor YBa2Cu3O6+x
• Progress in Neutron Scattering Studies of Spin Excitations in High-Tc Cuprates
• From incommensurate to dispersive spin-fluctuations: The high-energy inelastic spectrum in superconducting YBa2Cu3O6.5
• Resonant magnetic excitations at high energy in superconducting $\mathbf{YB}{\mathbf{a}}_2\mathbf{C}{\mathbf{u}}_3{\mathbf{O}}_{6.85}$
• Magnetic fluctuations from stripes in cuprates
• Unifying Magnons and Triplons in Stripe-Ordered Cuprate Superconductors
• Magnetic excitations in a bond-centered stripe phase: Spin waves far from the semi-classical limit
• Magnetic Resonant excitations in High-{${\mathrm{T}}_{\mathrm{c}}$} superconductors
• The magnetic nature of superconductivity in doped cuprates
• Doping dependence of spin excitations in the stripe phase of high-Tc superconductors
• Spin Waves in Striped Phases
• Magnetic Excitations of the Diagonal Incommensurate Phase in Lightly-Doped La2-xSrxCuO4
• Disorder-induced freezing of dynamical spin fluctuations in underdoped cuprates
• Hour-glass magnetic excitations induced by nanoscopic phase separation in cobalt oxides La${}_{2-x}$Sr${}_x$CoO${}_4$
• Weak ferromagnetic spin and charge stripe order in La[sub 5/3]Sr[sub 1/3]NiO[sub 4]
• Spin dynamics in the stripe phase of the cuprates
• Spin-wave dispersion in orbitally ordered La(0.5)Sr(1.5)MnO(4)
• Magnetic Excitations of Stripes Near a Quantum Critical Point
• Magnetic fluctuations in n-type high-$T_c$ superconductors reveal breakdown of fermiology
• Stripes in cuprate superconductors: Excitations and dynamic dichotomy
• Magnetic Excitations of Stripes and Checkerboards in the Cuprates
• Inward dispersion of the spin excitation spectrum of stripe-ordered La2NiO4+d
• Dynamical DMRG study of spin and charge excitations in the four-leg t-t'-J ladder
• Modelling Magnetic Fluctuations in the Stripe Ordered State
• Ising model with periodic pinning of mobile defects
• Modeling a striped pseudogap state
• Phenomenological lattice model for dynamic spin and charge fluctuations in the cuprates
• The spin excitation spectrum in striped bilayer compounds
• Hourglass dispersion in overdoped single-layered manganites
• Optical conductivity due to orbital polarons in systems with orbital degeneracy
• Magnetic Excitations of Coupled Spin Ladders: a Quantum Monte Carlo Study
• 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 field-induced soft mode in spin-gapped high-Tc superconductors
• Magnetic fluctuations in pair density wave superconductors
• Spin-wave dispersion in half-doped LaSrNiO
• Phenomenological theory of spin excitations in La- and Y-based cuprates
• Magnetic excitations in the stripe phase of high-T_c superconductors
• Spin Dynamics in the t-t'-J Model: Dynamical Density-Matrix Renormalization Group Study
• Magnetic Excitations in the Site-Centered Stripe Phase: Spin Wave Theory of Coupled Three-Leg Ladders
• Renormalization of Commensurate Magnetic Peak in Ni-doped La${}_{1.85}$Sr${}_{0.15}$CuO${}_4$
• Effects of Long-Range Interactions on Magnetic Excitations and Phase Transition on a Magnetically Frustrated Square Lattice
• Variational Monte Carlo study of spin dynamics in underdoped cuprates