Scaling of the magnetic response in doped antiferromagnets

Details Scaling of the magnetic response in doped antiferromagnets Scaling of the magnetic response in doped antiferromagnets

2003-06-13

arxiv.org/abs/cond-mat/0306366v2

Phys. Rev. Lett. 92, 027002 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.92.027002

A theory of the anomalous $\omega/T$ scaling of the dynamic magnetic response in cuprates at low doping is presented. It is based on the memory function representation of the dynamical spin suceptibility in a doped antiferromagnet where the damping of the collective mode is constant and large, whereas the equal-time spin correlations saturate at low $T$. Exact diagonalization results within the t-J model are shown to support assumptions. Consequences, both for the scaling function and the normalization amplitude, are well in agreement with neutron scattering results.

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