Mechanism of acoustically induced diffusional structuring of surface adatoms | Zendy

Chengping Wu | Zendy; V. I. Zaĭtsev | Zendy; Leonid V. Zhigilei | Zendy

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Mechanism of acoustically induced diffusional structuring of surface adatoms

Author(s) -

Chengping Wu,

V. I. Zaĭtsev,

Leonid V. Zhigilei

Publication year - 2013

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4832996

Subject(s) - structuring , adiabatic process , diffusion , oscillation (cell signaling) , surface diffusion , materials science , monte carlo method , kinetic monte carlo , chemical physics , statistical physics , mechanics , chemistry , physics , thermodynamics , mathematics , finance , adsorption , economics , biochemistry , statistics

Physical mechanisms of time-averaged structuring of adatoms induced by a standing surface acoustic wave (SAW) on a solid substrate are studied. Despite some similarity with conventional mechanisms based on averaging of fast oscillation-type motion or radiation-pressure effects, we demonstrate that, for diffusional (i.e., strongly damped) adatom motion, the origin of time-averaged structuring is essentially different. The proposed analytical model and kinetic Monte–Carlo (kMC) simulations reveal several distinct structuring regimes and directly relate them to the transient modification of diffusion barriers and adiabatic temperature variations induced by SAW strains.

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