Electromigration-driven Evolution of the Surface Morphology and Composition for a Bi-Component Solid Film

Khenner, Mikhail; Bandegi, Mahdi

doi:10.1051/mmnp/201510405

Cited by 3 publications

(3 citation statements)

References 34 publications

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“…Likewise, in Ref. [30] the linear growth rate of the surface perturbation is also enhanced when the surface atomic mobilities are different, but the long-time nonlinear evolution of the morphology is either slightly slowed or sped-up depending on which of the two atomic species has the higher mobility.…”

Section: Computations Of the Morphological And Compositional Evolutio...mentioning

confidence: 85%

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Modeling solid-state dewetting of a single-crystal binary alloy thin films

Khenner

2018

Journal of Applied Physics

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Dewetting of a binary alloy thin film is studied using a continuum many-parameter model that accounts for the surface and bulk diffusion, the bulk phase separation, the surface segregation and the particles formation. Analytical solution is found for the quasistatic equilibrium concentration of a surface-segregated atomic species. This solution is factored into the nonlinear and coupled evolution PDEs for the bulk composition and surface morphology. Stability of a planar film surface with respect to small perturbations of the shape and composition is analyzed, revealing the dependence of the particles size on major physical parameters. Computations show various scenarios of the particles formation and the redistribution of the alloy components inside the particles and on their surface. In most situations, for the alloy film composed initially of 50% A and 50% B atoms, a core-shell particles are formed, and they are located atop a wetting layer that is modestly rich in the B phase. Then the particles shell is the nanometric segregated layer of the A phase, and the core is the alloy that is modestly rich in the A phase.

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Section: Computations Of the Morphological And Compositional Evolutio...mentioning

confidence: 85%

“…Another model worth mention is Ref. [30], which adds the surface electromigration to the framework of Refs. [27,28].…”

Section: Introductionmentioning

confidence: 99%

Modeling solid-state dewetting of a single-crystal binary alloy thin films

Khenner

2018

Journal of Applied Physics

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“…Eq. ( 3) a random, short-wavelength initial deformation of the infinite planar surface perpetually coarsens -the size L of the structures increases as a power law in time [19,23,24]. Guided by Ref.…”

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confidence: 99%

Surface morphology coarsening in a nonlocal system

Khenner¹

2015

Preprint

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Direct comparison is made of the steady-sates and coarsening dynamics in a local system and its nonlocal generalization. The example system is the surface of a solid film in a strong electric field; the morphological evolution of the surface is described, in the long-wavelength approximation, by the amplitude PDE for the film height function. It is shown that the amplitude of the steady-state and the coarsening rate of the surface structure are very sensitive to the radius of the long-range interaction, and that both quantities increase as the radius decreases.

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Electromigration-guided composition patterns in thin alloy films: A computational study

Khenner

2020

Surface Science

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Electromigration-driven Evolution of the Surface Morphology and Composition for a Bi-Component Solid Film

Cited by 3 publications

References 34 publications

Modeling solid-state dewetting of a single-crystal binary alloy thin films

Modeling solid-state dewetting of a single-crystal binary alloy thin films

Surface morphology coarsening in a nonlocal system

Electromigration-guided composition patterns in thin alloy films: A computational study

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