Phys. Rev. Lett. 83, 4381–4384 (1999)Spinless Impurities in High- Tc Cuprates: Kondo-Like BehaviorReceived 9 June 1999; published in the issue dated 22 November 1999 We compare the effects of in-plane nonmagnetic Li+ and Zn2+ impurities on the normal state of high- Tc cuprates. 89Y NMR shows that the extra hole introduced by Li is not localized in its vicinity. The Tc depression and induced moments on near neighbor Cu sites of Zn or Li are found to be identical. These effects of spinless impurities establish the major influence of the spin perturbation with respect to the charge defect. The susceptibility of the induced moment measured by 7Li NMR displays a 1/(T+Θ) behavior. Θ increases with doping up to about 200 K in the overdoped regime. We attribute this to a “Kondo-like” effect. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.4381
DOI:
10.1103/PhysRevLett.83.4381
PACS:
74.25.Nf, 74.62.Dh, 74.72.Bk
See AlsoComment: J. L. Tallon, J. W. Loram, and G. V. Williams, Comment on “Spinless Impurities In High- Tc Cuprates: Kondo-Like Behavior”, Phys. Rev. Lett. 88, 059701 (2002). Reply: J. Bobroff, W. A. MacFarlane, H. Alloul, and P. Mendels, Bobroff et al. Reply:, Phys. Rev. Lett. 88, 059702 (2002). |
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