Spin-wave dispersion in half-doped LaSrNiO

Abstract

Recent neutron scattering measurements reveal spin and charge ordering in the half-doped nickelate, La${}_{3/2}$ Sr${}_{1/2}$ NiO${}_4$. Many of the features of the magnetic excitations have been explained in terms of the spin waves of diagonal stripes with weak single-ion anisotropy. However, an optical mode dispersing away from the (π,π) point was not captured by this theory. We show here that this apparent optical mode is a natural consequence of stripe twinning in a diagonal stripe pattern with a magnetic coupling structure which is two-fold symmetric, i.e. one possessing the same spatial rotational symmetry as the ground state.

4 pages, 5 figures

References in corpus (7)

• Complexity in Strongly Correlated Electronic Systems
• Spin Waves in Striped Phases
• Spin dynamics of stripes
• Spin dynamics in stripe-ordered La5/3Sr1/3NiO4
• High-Energy Spin Dynamics in La${}_{1.69}$Sr${}_{0.31}$NiO${}_4$
• Spin Dynamics of Half-Doped La3/2Sr1/2NiO4
• Magnetic Excitations of Stripes and Checkerboards in the Cuprates

Cited by in corpus (5)

• Trilayer multi-orbital models of $\mathrm{L}{\mathrm{a}}_4\mathrm{N}{\mathrm{i}}_3{\mathrm{O}}_{10}$
• Spin wave theory study of neutron intensity, magnetic field, and anisotropy of Type IIA FCC antiferromagnet
• General trends of electronic structures, superconducting pairing, and magnetic correlations in the Ruddlesden-Popper nickelate $m$-layered superconductors La${}_{m+1}$Ni${}_m$O${}_{3m+1}$
• Development of the Magnetic Excitations of Charge-Stripe Ordered La(2-x)Sr(x)NiO(4) on Doping Towards Checkerboard Charge Order
• Pairing mechanism and superconductivity in pressurized La${}_5$Ni${}_3$O${}_{11}$