Field-induced local moments around nonmagnetic impurities in metallic cuprates

Details Field-induced local moments around nonmagnetic impurities in metallic cuprates Field-induced local moments around nonmagnetic impurities in metallic cuprates

2007-10-30

arxiv.org/abs/0710.5747v1

Physics

Condensed Matter

Superconductivity

7 pages, submitted to Phys Rev B

Scientific paper

10.1103/PhysRevB.77.165110

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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