NMR properties of a one-dimensional Cu-O model

摘要

We obtain the Knight shifts and the relaxation rates related to the Fermi contact interaction term for a one-dimensional Cu-O model using bosonization technique. We consider the small interaction limit at half-filling and away from half-filling. In this framework we predict that the antiferromagnetic contribution to the relaxation rate of the nuclear oxygen spin is completely suppressed even away from half-filling, when the temperature is low enough. In the strong interaction limit at half-filling we compute the effective Fermi contact interaction, performing a Gutzwiller projection. Both limits suggest that the one-dimensional versions of the Mila-Rice and Shastry scenarios of transferred hyperfine couplings, which were proposed to explain the NMR measurements for high-T-c cuprates, fail in a one-dimensional situation. [References: 24]