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Field-induced local moments around nonmagnetic impurities in metallic cuprates

M. Gabay1, E. Semel1, P. J. Hirschfeld2, and W. Chen2

  • 1Laboratoire de Physique des Solides, Université Paris-Sud, UMR 8502, F-91405 Orsay, France
  • 2Department of Physics, University of Florida, Gainesville, Florida 32611, USA

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Phys. Rev. B 77, 165110 – Published 4 April, 2008

DOI: https://doi.org/10.1103/PhysRevB.77.165110

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 modeling 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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Phys. Rev. B 77, 165110– Published 4 April, 2008
  • Received 7 November 2007

© 2008 American Physical Society

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