Directed long-range transport of a nearly pure component atom clusters by the electromigration of a binary surface alloy

Mikhail Khenner
Phys. Rev. Materials 5, 024001 – Published 10 February 2021; Erratum Phys. Rev. Materials 5, 069901 (2021)

Abstract

Assuming a vacancy-mediated diffusion, a continuum model for electromigration-driven transport of an embedded atom cluster across a surface terrace of a phase-separating AxB1x surface alloy, such as fcc AgPt(111), is presented. Computations show that the electron wind carries the cluster over hundreds of lattice spacings and in the set direction, while the cluster grows and its purity improves during the drift. Impacts of the current density, the diffusion anisotropy, the magnitude, and sign of the ratio of the effective charges qA/qB, and the jump frequencies ratio ΓA/ΓB on the cluster's drift speed, drift direction, purity, and shape are demonstrated.

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  • Received 29 September 2020
  • Revised 13 January 2021
  • Accepted 26 January 2021

DOI:https://doi.org/10.1103/PhysRevMaterials.5.024001

©2021 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Erratum

Authors & Affiliations

Mikhail Khenner*

  • Department of Mathematics, Western Kentucky University, Bowling Green, Kentucky 42101, USA and Applied Physics Institute, Western Kentucky University, Bowling Green, Kentucky 42101, USA

  • *mikhail.khenner@wku.edu

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Vol. 5, Iss. 2 — February 2021

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