Dimer diffusion as a driving mechanism of the step bunching instability during homoepitaxial growth

M. Vladimirova; A. De Vita; A. Pimpinelli

doi:10.1103/PhysRevB.64.245420

Dimer diffusion as a driving mechanism of the step bunching instability during homoepitaxial growth

M. Vladimirova, A. De Vita, A. Pimpinelli

Houston Methodist

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

The impact of ad-dimer diffusion on the morphology of an epitaxially growing stepped surface is studied analytically and by kinetic Monte Carlo simulations. It is shown that if diffusing adatoms are hindered by an Ehrlich-Schwoebel barrier at step edges, ad-dimer diffusion gives rise to a step bunching instability, provided that the corresponding Ehrlich-Schwoebel barrier for ad-dimers is small or vanishing.

Original language	English (US)
Article number	245420
Pages (from-to)	2454201-2454206
Number of pages	6
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	64
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevB.64.245420
State	Published - Dec 15 2001

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.64.245420

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abstract = "The impact of ad-dimer diffusion on the morphology of an epitaxially growing stepped surface is studied analytically and by kinetic Monte Carlo simulations. It is shown that if diffusing adatoms are hindered by an Ehrlich-Schwoebel barrier at step edges, ad-dimer diffusion gives rise to a step bunching instability, provided that the corresponding Ehrlich-Schwoebel barrier for ad-dimers is small or vanishing.",

author = "M. Vladimirova and {De Vita}, A. and A. Pimpinelli",

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AU - Pimpinelli, A.

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N2 - The impact of ad-dimer diffusion on the morphology of an epitaxially growing stepped surface is studied analytically and by kinetic Monte Carlo simulations. It is shown that if diffusing adatoms are hindered by an Ehrlich-Schwoebel barrier at step edges, ad-dimer diffusion gives rise to a step bunching instability, provided that the corresponding Ehrlich-Schwoebel barrier for ad-dimers is small or vanishing.

AB - The impact of ad-dimer diffusion on the morphology of an epitaxially growing stepped surface is studied analytically and by kinetic Monte Carlo simulations. It is shown that if diffusing adatoms are hindered by an Ehrlich-Schwoebel barrier at step edges, ad-dimer diffusion gives rise to a step bunching instability, provided that the corresponding Ehrlich-Schwoebel barrier for ad-dimers is small or vanishing.

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Dimer diffusion as a driving mechanism of the step bunching instability during homoepitaxial growth

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