Comment on "Spinless impurities in High-Tc Cu-prates: Kondo-like behavior"

J. L. Tallon, J. W. Loram, G. V. M. Williams

The recent obervation of a Kondo-like temperature dependence in the Li NMR Knight shift in Ca- and Li- cosubstituted YBa2Cu3O7-d was attributed by Bobroff et al. to be evidence of…