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arXiv · 0710.5747

Field-induced local moments around nonmagnetic impurities in metallic cuprates

M. Gabay·E. Semel·P. J. Hirschfeld·W. Chen
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Abstract

We consider a defect in a strongly correlated host metal and discuss, within a slave boson mean field formalism for the $t-t'-J$ model, the formation of an induced paramagnetic moment which is extended over nearby sites. We study in particular an impurity in a metallic band, suitable for modelling the optimally doped cuprates, in a regime where the impurity moment is paramagnetic. The form of the local susceptibility as a function of temperature and doping is found to agree well with recent NMR experiments, without including screening processes leading to the Kondo effect.

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M. Gabay, E. Semel, P. J. Hirschfeld, W. Chen. 2007-10-30. Field-induced local moments around nonmagnetic impurities in metallic cuprates. https://doi.org/10.1103/physrevb.77.165110

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