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Anomalous Spin Dynamics in Doped Quantum Antiferromagnets

J. Jaklic·P. Prelovsek
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Abstract

Finite-temperature spin dynamics in planar t-J model is studied using the method based on the Lanczos diagonalization of small systems. Dynamical spin structure factor at moderate dopings shows the coexistence of free-fermion-like and spin-fluctuation timescales. At T<J, the low-frequency and static susceptibility show pronounced T dependence, supporting a scenario, related to the marginal Fermi-liquid one, for the explanation of neutron-scattering and NMR-relaxation experiments in cuprates. Calculated NMR relaxation rates reasonably reproduce experimental ones.

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J. Jaklic, P. Prelovsek. 1994-10-24. Anomalous Spin Dynamics in Doped Quantum Antiferromagnets. https://doi.org/10.1103/physrevlett.74.3411

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