Quantum dot formation on a strain-patterned epitaxial thin film
Author(s) -
Steven M. Wise,
John Lowengrub,
Junseok Kim,
Katsuyo Thornton,
P.W. Voorhees,
William C. Johnson
Publication year - 2005
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 - 10.1063/1.2061852
Subject(s) - quantum dot , epitaxy , materials science , anisotropy , condensed matter physics , substrate (aquarium) , isotropy , surface energy , strain (injury) , self assembly , strain energy , thin film , quantum , nanotechnology , optoelectronics , optics , composite material , physics , layer (electronics) , medicine , oceanography , quantum mechanics , finite element method , geology , thermodynamics
We model the effect of substrate strain patterning on the self-assembly of quantum dots (QDs). When the surface energy is isotropic, we demonstrate that strain patterning via embedded substrate inclusions may result in ordered, self-organized QD arrays. However, for systems with strong cubic surface energy anisotropy, the same patterning does not readily lead to an ordered array of pyramids at long times. We conclude that the form of the surface energy anisotropy strongly influences the manner in which QDs self-assemble into regular arrays
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