Fig. 5

Emergence of a Kondo echo. Experimental Kondo droplets for a \(\Delta {r}_{{\rm{1}}}=4{a}_{0}\) (droplet 1), and b \(\Delta {r}_{{\rm{2}}}=4\sqrt{3}{a}_{0}\) (droplet 2) with a Kondo hole (vacancy) at the center site. c, d Experimental \({\mathrm{d}}I/{\mathrm{d}}V\) at \(V=10\) mV acquired along a horizontal cut through the Kondo droplets in a, b, respectively. Theoretical Kondo droplets for e \(\Delta {r}_{{\rm{1}}}=4{a}_{0}\), and f \(\Delta {r}_{{\rm{2}}}=4\sqrt{3}{a}_{0}\) with a Kondo hole (vacancy) at the center site. g, h Theoretical \({\mathrm{d}}I/{\mathrm{d}}V\) at \(E=10\) meV along a horizontal cut (gray line) through the Kondo droplets in e, f, respectively. The spatial (\(x\)-axis) scale is the same in panels a, c, e, g (b, d, f, h). A detailed discussion of how the theoretical \({\mathrm{d}}I/{\mathrm{d}}V\) was computed is provided in Supplementary Note 5.