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Spin correlations among the charge carriers in an ordered stripe phase

A. T. Boothroyd·P. G. Freeman·D. Prabhakaran·A. Hiess·M. Enderle·J. Kulda·F. Altorfer
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Abstract

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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A. T. Boothroyd, P. G. Freeman, D. Prabhakaran, A. Hiess, M. Enderle, J. Kulda, F. Altorfer. 2003-10-27. Spin correlations among the charge carriers in an ordered stripe phase. https://doi.org/10.1103/physrevlett.91.257201

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