Figure 1

(a) $650\times 650{\mathrm{\AA }}^2$ STM image recorded after 0.25 ML of Si adsorbed on the fivefold $\mathrm{Al}\text{−}\mathrm{Pd}\text{−}\mathrm{Mn}$ surface. (b) The coverage is increased to 0.75 ML $(640\times 640{\mathrm{\AA }}^2)$. (c) The 3D nature of the growth mode is evident at 3.6 ML $(330\times 330{\mathrm{\AA }}^2)$. (d) The ratio of the peak-to-peak intensity of the ${\mathrm{Si}}_{LVV}$ $\left(92\mathrm{eV}\right)$ and ${\mathrm{Al}}_{LVV}$ $\left(68\mathrm{eV}\right)$ Auger peaks is plotted against the coverage in ML.Reuse & Permissions

Figure 2

$403\times 218{\mathrm{\AA }}^2$ STM image for a Si coverage identical to Fig. 1a. Two 1D Fibonacci sequences have been drawn following the method of Schaub et al. (Ref. 12). Si atoms appear as white protrusions and sit on these Fibonacci lines.Reuse & Permissions

Figure 3

(a) Fast Fourier transform calculated when only Si atoms (0.25 ML coverage) are selected by a thresholding procedure over an area equal to $388100{\mathrm{\AA }}^2$. (b) $138\times 138{\mathrm{\AA }}^2$ autocorrelation function obtained from Si atoms.Reuse & Permissions

Figure 4

(a) $33\times 33{\mathrm{\AA }}^2$ STM image of the clean $\mathrm{Al}\text{−}\mathrm{Pd}\text{−}\mathrm{Mn}$ surface. A white flower corresponding to a truncated pseudo-Mackay cluster is indicated by the large circle, and a dark star corresponding to a truncated Bergman cluster is shown by the smaller circle. (b) Theoretical model of the surface (Ref. 11), with circles again representing truncated pseudo-Mackay and Bergman clusters. (c) STM image of a single Si atom adsorbed on the surface. The dimensions are identical for (a), (b), and (c). (d) Radial distribution functions calculated from autocorrelation functions. The top curve labeled $M$ is a simulation calculated for Si atoms adsorbing in the center of the truncated pseudo-Mackay cluster. The bottom curve represents the radial distribution function calculated from the experimental data at 0.25 ML coverage.Reuse & Permissions