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arXiv · 1411.6575

How "hot precursors" modify island nucleation: A rate-equations model

Josue R. Morales-Cifuentes·T. L. Einstein·A. Pimpinelli
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Abstract

We propose a novel island nucleation and growth model explicitly including transient (ballistic) mobility of the monomers deposited at rate $F$, assumed to be in a hot precursor state before thermalizing. In limiting regimes, corresponding to fast (diffusive) and slow (ballistic) thermalization, the island density $N$ obeys scaling $N \propto F^α$. In between is found a rich, complex behavior, with various distinctive scaling regimes, characterized by effective exponents $α_{\rm eff}$ and activation energies that we compute exactly. Application to $N(F,T)$ of recent organic-molecule deposition experiments yields an excellent fit.

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Josue R. Morales-Cifuentes, T. L. Einstein, A. Pimpinelli. 2014-11-24. How "hot precursors" modify island nucleation: A rate-equations model. https://doi.org/10.1103/physrevlett.113.246101

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