We present first-principles calculations elucidating the different self-assembly mode of Cu nanowires on vicinal surfaces of Mo (ordered "one-dimensional" growth) and W (rough, disordered growth). The severe differences in growth mode despite the decided similarity between the substrates is linked to subtle electronic-structure coupling effects between substrate and adsorbate, while kinetics and stress effects are found to be immaterial. Our findings suggest additional degrees of freedom to steer the growth mode of low-dimensional assemblies in thermodynamical equilibrium.
Ordered versus disordered growth of copper quantum wires on Mo and W vicinal surfaces
RUGGERONE, PAOLO;FIORENTINI, VINCENZO
2003-01-01
Abstract
We present first-principles calculations elucidating the different self-assembly mode of Cu nanowires on vicinal surfaces of Mo (ordered "one-dimensional" growth) and W (rough, disordered growth). The severe differences in growth mode despite the decided similarity between the substrates is linked to subtle electronic-structure coupling effects between substrate and adsorbate, while kinetics and stress effects are found to be immaterial. Our findings suggest additional degrees of freedom to steer the growth mode of low-dimensional assemblies in thermodynamical equilibrium.
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