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Table 1 The energies of NN and effective NNN bonds and their ratio on metal surfaces

From: Low-energy structures of clusters supported on metal fcc(110) surfaces

Surface	Cu (RGL)	Ni (EAM)	Ag (SEAM)	Pt (SEAM)
E _nn	0.2404	0.2824	0.2569	0.3972
$E_{nnn}^{*}$	0.04570	0.04129	0.00684	−0.16753
ξ	5.26	6.84	37.56	−2.37
$n_{1}^{c}$	12	14	76	-
$n_{2}^{c}$	35	41	227	-
A	0.269	0.207	0.038	-

$n_{1}^{c}$ and $n_{2}^{c}$ are the critical sizes predicted by Equation 11, which are in accordance with those from GA optimization. A is the aspect ratio of the equilibrium island given by Equation 14.

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