Step-edge versus interior barriers to atom incorporation at lattice steps

Sang Mun Oh; Kentaro Kyuno; Shi Cai Wang; Gert Ehrlich

doi:10.1103/PhysRevB.67.075413

Step-edge versus interior barriers to atom incorporation at lattice steps

Sang Mun Oh, Kentaro Kyuno, Shi Cai Wang, Gert Ehrlich

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

8 Citations (Scopus)

Abstract

Observations of the spatial distribution of individual atoms over close-packed (111) clusters of the fcc metals platinum as well as iridium reveal that atoms preferentially populate the inner region. The inner region is separated by an energy barrier from the step edge, leaving empty of adatoms a ring approximately three nearest-neighbor distances wide. The effect of such an interior energy barrier upon the lifetime to atom incorporation into steps is explored for one- as well as two-dimensional clusters. Interior barriers are found to increase the lifetime to incorporation much more than the conventional step-edge barrier, and may significantly affect the morphology of growing surfaces.

Original language	English
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	67
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevB.67.075413
Publication status	Published - 2003 Feb 26
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.67.075413

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AU - Kyuno, Kentaro

AU - Wang, Shi Cai

AU - Ehrlich, Gert

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Y1 - 2003/2/26

N2 - Observations of the spatial distribution of individual atoms over close-packed (111) clusters of the fcc metals platinum as well as iridium reveal that atoms preferentially populate the inner region. The inner region is separated by an energy barrier from the step edge, leaving empty of adatoms a ring approximately three nearest-neighbor distances wide. The effect of such an interior energy barrier upon the lifetime to atom incorporation into steps is explored for one- as well as two-dimensional clusters. Interior barriers are found to increase the lifetime to incorporation much more than the conventional step-edge barrier, and may significantly affect the morphology of growing surfaces.

AB - Observations of the spatial distribution of individual atoms over close-packed (111) clusters of the fcc metals platinum as well as iridium reveal that atoms preferentially populate the inner region. The inner region is separated by an energy barrier from the step edge, leaving empty of adatoms a ring approximately three nearest-neighbor distances wide. The effect of such an interior energy barrier upon the lifetime to atom incorporation into steps is explored for one- as well as two-dimensional clusters. Interior barriers are found to increase the lifetime to incorporation much more than the conventional step-edge barrier, and may significantly affect the morphology of growing surfaces.

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Step-edge versus interior barriers to atom incorporation at lattice steps

Abstract

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