Spin correlations among the charge carriers in an ordered stripe phase

Details Spin correlations among the charge carriers in an ordered stripe phase Spin correlations among the charge carriers in an ordered stripe phase

2003-10-27

arxiv.org/abs/cond-mat/0310631v1

Phys. Rev. Lett. 91 (2003) 257201

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures. To be published in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.91.257201

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.

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