title: Scaling of the magnetic response in doped antiferromagnets.
abstract: 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 susceptibility 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, for both the scaling function and the normalization amplitude, are well in agreement with neutron scattering results.
authors.affiliation: J. Stefan Institute, SI-1000 Ljubljana, Slovenia.
authors.forename: P
authors.initials: P
authors.lastname: Prelovsek
authors.forename: I
authors.initials: I
authors.lastname: Sega
authors.forename: J
authors.initials: J
authors.lastname: Bonca