Phys. Rev. Lett. 91, 257201 (2003) [4 pages]Spin Correlations among the Charge Carriers in an Ordered Stripe PhaseReceived 3 September 2003; published 15 December 2003 We have observed a diffuse component to the low-energy magnetic excitation spectrum of stripe-ordered La5/3Sr1/3NiO4 probed by neutron inelastic scattering. The diffuse scattering forms a square pattern with sides parallel and perpendicular to the stripe directions. The signal is dispersive, with a maximum energy of ∼10 meV. Probed at 2 meV, the scattering decreases in strength with increasing temperature, and is barely visible at 100 K. We argue that the signal originates from dynamic, quasi-one-dimensional, antiferromagnetic correlations among the stripe electrons. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.257201
DOI:
10.1103/PhysRevLett.91.257201
PACS:
75.40.Gb, 71.45.Lr, 75.30.Et, 75.30.Fv
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