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The self-assembly of iron dots on the insulating surface of NaCl(001) isinvestigated experimentally and theoretically. Under proper growth conditions,nanometer-scale magnetic iron dots with remarkably narrow size distributionscan be achieved in the absence of a wetting layer Furthermore, both thevertical and lateral sizes of the dots can be tuned with the iron dosagewithout introducing apparent size broadening, even though the clustering isclearly in the strong coarsening regime. These observations are interpretedusing a phenomenological mean-field theory, in which a coverage-dependentoptimal dot size is selected by strain-mediated dot-dot interactions.Comment: 5 pages, 4 figure

Self-Assembly of Nanometer-Scale Magnetic Dots with Narrow Size Distributions on an Insulating Substrate