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Title: Island, pit, and groove formation in strained heteroepitaxy
Authors: Lung, M. T.
Lam, Chi-hang
Sander, Leonard M.
Subjects: Deposition
Elastic moduli
Surface roughness
Thermal effects
Thin films
Issue Date: 19-Aug-2005
Publisher: American Physical Society
Source: Physical review letters, 19 Aug. 2005, v. 95, no. 8, 086102, p. 1-4.
Abstract: We study the morphological evolution of strained heteroepitaxial films using a kinetic Monte Carlo method in three dimensions. The elastic part of the problem uses a Green’s function method. Isolated islands are observed under deposition conditions for deposition rates slow compared with intrinsic surface roughening rates. They are hemispherical and truncated conical for high and low temperature cases, respectively. Annealing of films at high temperature leads to the formation of closely packed islands as in instability theory. At low temperature, pits form via a multistep layer-by-layer nucleation mechanism in contrast to the conventional single-step nucleation process. They subsequently develop into grooves, which are energetically more favorable.
Rights: Physical Review Letters © 2005 The American Physical Society. The Journal's web site is located at
Type: Journal/Magazine Article
DOI: 10.1103/PhysRevLett.95.086102
ISSN: 0031-9007 (print)
1079-7114 (online)
Appears in Collections:AP Journal/Magazine Articles

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