Circular-to-elliptical-to-circular shape transitions of strained islands

被引：0
|
作者：
Berghal, Zainab [1 ]
Durinck, Julien [2 ]
Bakali, Assia [3 ]
Talea, Mohamed [1 ]
Grilhe, Jean [2 ]
Colin, Jerome [2 ]
机构：
[1] Hassan II Univ Casablanca, Fac Sci Ben Msik, Lab Informat Proc, BP 7955, Casablanca 20450, Morocco
[2] Univ Poitiers, ENSMA, Inst P, SP2MI Teleport 2, F-86962 Futuroscope, France
[3] Royal Naval Sch, Blvd Sour Jdid, Casablanca, Morocco
来源：
THIN SOLID FILMS | 2017年 / 631卷
关键词：
Island; Strain; Elasticity; Thermodynamics; Morphology; STRESS; GROWTH;
D O I：
10.1016/j.tsf.2017.04.024
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The shape transition of a one-layer thick strained island deposited on a semi-infinite substrate has been theoretically investigated from an energy variation calculation. It is found that depending on the misfit strain, the initially circular island may become unstable beyond a critical size and can evolve toward an elliptical shape. As the surface of the island increases, another transition is expected to occur which consists in the ellipse splitting into two identical circular islands of smaller size. A shape diagram is finally displayed for the island as a function of the misfit strain and island surface and a scenario of nanostructure evolution is discussed. (C) 2017 Elsevier B.V. All rights reserved.
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页码：189 / 192
页数：4
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