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2. Microscopic View of Nucleation on Surfaces
3. Temperature dependence of the sputtering morphology of Pt(111)
4. [42] This important difference has first been realized by Zhang et al. in ref. 37
5. [41] During preparation of this manuscript it came to our attention that also Michely et al. interpret their islands as dendritic. They suggest a similar explanation based on anisotropic corner diffusion.