Magnetic fluctuations and resonant peak in cuprates: a microscopic theory

Details Magnetic fluctuations and resonant peak in cuprates: a microscopic theory Magnetic fluctuations and resonant peak in cuprates: a microscopic theory

2002-11-05

arxiv.org/abs/cond-mat/0211090v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures

Scientific paper

10.1103/PhysRevB.68.054524

The theory for the dynamical spin susceptibility within the t-J model is developed, as relevant for the resonant magnetic peak and normal-state magnetic response in superconducting (SC) cuprates. The analysis is based on the equations of motion for spins and the memory-function presentation of magnetic response where the main damping of the low-energy spin collective mode comes from the decay into fermionic degrees of freedom. It is shown that the damping function at low doping is closely related to the c-axis optical conductivity. The analysis reproduces doping-dependent features of the resonant magnetic scattering.

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