Inward dispersion of the spin excitation spectrum of stripe-ordered La2NiO4+d

Abstract

Polarized- and unpolarized-neutron scattering measurements of the spin excitation spectrum in the stripe-ordered phase of La2NiO4+d (d = 0.11) are presented. At low energies, the magnetic spectral weight is found to shift anomalously towards the two-dimensional antiferromagnetic wave vector, similar to the low-energy dispersions observed in cuprate superconductors. While spin-wave spectra in stripe phases can exhibit an apparent inward dispersion, we find that the peak shifts measured here cannot be accounted for by this effect. Possible extensions of the model are discussed.

arXiv comment7 pages, 6 figures; to be published in Phys. Rev. B

References in corpus (23)

• Quantum Magnetic Excitations from Stripes in Copper-Oxide Superconductors
• Lattice symmetry breaking in cuprate superconductors: Stripes, nematics, and superconductivity
• The Spin Excitation Spectrum in Superconducting $\mathbf{YB}{\mathbf{a}}_2\mathbf{C}{\mathbf{u}}_3{\mathbf{O}}_{6.85}$
• Spin dynamics in the pseudogap state of a high-temperature superconductor
• In-plane anisotropy of spin excitations in the normal and superconducting states of underdoped YBa${}_2$Cu${}_3$O${}_{6+x}$
• Two energy scales in the spin excitations of the high-T_c superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$
• From incommensurate to dispersive spin-fluctuations: The high-energy inelastic spectrum in superconducting YBa2Cu3O6.5
• Stripe order at low temperatures in La{2-x}Sr{x}NiO4 for 1/3 < x < 1/2
• Universal Dispersive Excitations in the High-Temperature Superconductors
• 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
• Dispersion of Magnetic Excitations in Superconducting Optimally Doped YBa_2Cu_3O_6.95
• Spin dynamics of stripes
• Spin Waves in Striped Phases
• Magnetic Excitations of the Diagonal Incommensurate Phase in Lightly-Doped La2-xSrxCuO4
• Unified Description of the Resonance Peak and Incommensuration in High-$T_c$ Superconductors
• Spin dynamics in stripe-ordered La5/3Sr1/3NiO4
• High-Energy Spin Dynamics in La${}_{1.69}$Sr${}_{0.31}$NiO${}_4$
• Spin dynamics in the stripe phase of the cuprates
• Magnetic Excitations of Stripes Near a Quantum Critical Point
• Spin reorientation transition in the incommensurate stripe-ordered phase of La3/2Sr1/2NiO4
• Magnetic Order and Dynamics in Stripe-Ordered La2-xSrxNiO4

Cited by in corpus (8)

• Spin transport in the Neel and collinear antiferromagnetic phase of the two dimensional spatial and spin anisotropic Heisenberg model on a square lattice
• Charge and orbital order in transition metal oxides
• Magnetic excitations of the charge stripe electrons below half doping in La(2-x)Sr(x)NiO4, x = 0.45 and x = 0.4
• General trends of electronic structures, superconducting pairing, and magnetic correlations in the Ruddlesden-Popper nickelate $m$-layered superconductors La${}_{m+1}$Ni${}_m$O${}_{3m+1}$
• Stability of charge-stripe ordered La2-xSrxNiO4+delta at one third doping
• Pairing mechanism and superconductivity in pressurized La${}_5$Ni${}_3$O${}_{11}$
• Effects of Long-Range Interactions on Magnetic Excitations and Phase Transition on a Magnetically Frustrated Square Lattice
• Evidence of Magnetic Correlations Among the Charge Stripe Electrons of Charge-Stripe Ordered La2NiO4.11