Strain E?ect on the Instability of Island Formation in Submonolayer Heteroepitaxy

Journal Article · Thu Jan 01 00:00:00 EST 2009 · European Physics Letters

OSTI ID:958827

Yao, yugui ^[1]; Li, Maozhi ^[2]; Wu, Biao ^[3]; Zhang, Zhenyu ^[3]; Wang, Enge ^[1]

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1. Chinese Academy of Sciences
2. Ames Laboratory
3. ORNL

Strain e ect on the instability of island formation in submonolayer heteroepitaxy is studied in both thermodynamic and kinetic regimes. By using linear stability analysis, the energy change of an island due to small perturbations is analyzed. A phase diagram is constructed to illustrate the interplay between kinetic processes and strain e ect on the shape instability. Critical island sizes beyond which islands grow unstable are also derived for various growth conditions and can be used to estimate energy parameters. The scaling forms of shape instability are also discussed.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 958827
• Journal Information: European Physics Letters, Vol. 86, Issue 1; ISSN 0295-5075
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
INSTABILITY
ISLANDS
KINETICS
PHASE DIAGRAMS
SHAPE
STABILITY
STRAINS
THERMODYNAMICS