lowered, the next-nearest neighbors (NNN) of the defect exhibit a lower, but negative, magnetic response, providing evidence of antiferromagnetic correlations around the depleted site. As the distance from the depleted site grows, $\chi_{\bf i}^{ff}$ decays with distance, eventually approaching the value for the regular PAM. An alternate visualization of the enhancement of antiferromagnetic correlations, is given in Fig.\[Fig:local\_chi\_contour\], a color contour plot of $\chi_{\bf
i}^{ff}$. The formation of a small antiferromagnetic ‘cloud’ around the magnetic defect is evident. When the hybridization is increased (not shown) the magnetic response for the NN sites remains high, but is strongly suppressed on sites farther from the impurity. The characteristic size of the ‘cloud’ decreases as one moves deeper into the singlet phase. The results of Figs.\[Fig:local\_chi\] and \[Fig:local\_chi\_contour\] are consistent with DMRG calculations for a single depletion in the one-dimensional Kondo Lattice Model (KLM)[@CYu96] and with the behavior of a corresponding model of localized spins; see Ref..

![(Color online) Contour plot of the local $f$ electron density of states, $N^{f}_{\mathbf{i}}(0)$, for $\beta t = 20$. The black square corresponds to the impurity location, as in Fig. \[Fig:local\_chi\_contour\].[]{data-label="Fig:local_DOS_Nf_contour"}](DOS_L160_Nf.pdf)

As noted earlier, the presence of magnetic clouds around impurities is a characteristic feature of real 