Surface diffusion and growth of patterned nanostructures on strained surfaces

R. F. Sabiryanov, M. I. Larsson, W. D. Nix, B. M. Clemens, K. J. Cho

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

We propose a method of controllable growth of patterned nanostructures on a surface with a self-organized network of buried dislocations. The general treatment for the diffusion of Co adatoms and growth on the strained Pt surface is given as a prototype for magnetic recording media. Ab initio self-consistent calculations of surface diffusion events of a Co adatom on the Pt(111) surface show that adatoms prefer to diffuse to the regions of largest tensile strain. The hopping barrier for adatom diffusion increases with tensile strain showing that preferred nucleation occurs in the regions of high tensile stress. The variation of the hopping barrier on the underlying strain produced by buried dislocations is analyzed in terms of a surface stress relief picture based on ab initio calculations. Based on these results, kinetic Monte Carlo studies of the growth of Co on Pt(111) have been performed; they show the possibility of controlled growth of patterned nanostructures with appropriate choice of dislocation spacing, film thickness and temperature.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume67
Issue number12
DOIs
StatePublished - Mar 18 2003

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Adatoms
Surface diffusion
surface diffusion
adatoms
Nanostructures
Tensile strain
Stress relief
Magnetic recording
magnetic recording
tensile stress
Tensile stress
Film thickness
Nucleation
film thickness
prototypes
spacing
nucleation
Kinetics
kinetics
Temperature

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Surface diffusion and growth of patterned nanostructures on strained surfaces. / Sabiryanov, R. F.; Larsson, M. I.; Nix, W. D.; Clemens, B. M.; Cho, K. J.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 67, No. 12, 18.03.2003.

Research output: Contribution to journalArticle

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