Structural Transition in Large-Lattice-Mismatch Heteroepitaxy

Journal Article · Thu Oct 31 23:00:00 EST 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.4046· OSTI ID:389395

Chen, Y; Washburn, J ^[1]

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1. Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States)

The mechanisms of island nucleation, growth, and dislocation formation in large-lattice-mismatch heteroepitaxy is analyzed theoretically. It is shown that 2D platelets tend to transform to 3D islands as they exceed a certain critical size. During island growth, the increase of the strain concentration at the island edge makes it increasingly difficult for adatoms to reach the island, which leads to the formation of homogeneously sized islands. The high strain concentration at the island edge is eventually relieved by growing in of misfit dislocations. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Lawrence Berkeley National Laboratory
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 389395
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 19 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DISLOCATIONS
EPITAXY
FILM GROWTH
GALLIUM ARSENIDES
GERMANIUM
GROWTH
INDIUM ARSENIDES
ISLAND STRUCTURE
NUCLEATION
PHASE TRANSFORMATIONS
STRAINS
STRUCTURAL MODELS