Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/107049
Title: Formation of self-assembled heteroepitaxial islands in elastically anisotropic films
Authors: Liu, P.
Zhang, Y.W. 
Lu, C.
Issue Date: Apr-2003
Source: Liu, P.,Zhang, Y.W.,Lu, C. (2003-04). Formation of self-assembled heteroepitaxial islands in elastically anisotropic films. Physical Review B - Condensed Matter and Materials Physics 67 (16) : 1654141-1654146. ScholarBank@NUS Repository.
Abstract: The formation of self-assembled heteroepitaxial islands in elastically anisotropic cubic films is investigated by a three-dimensional dynamic method. In the formulation, the {100} film surfaces evolve through surface diffusion driven by the gradient of the surface chemical potential. Our simulations reveal that when the elastic anisotropic strength A [A is defined as 2C44/(C11-C12), where C11, C12, and C44 are elastic constants] is larger than 1 the formed islands are preferentially aligned along 〈100〉 directions, while when A is smaller than 1 the formed islands are preferentially aligned along the 〈110〉 directions. It is found that the stronger the elastic anisotropy, the stronger the island self-assembly. In addition, the island alignment and averaged island spacing right after island formation are found to be related to the smallest fastest surface instability wavelength of the elastically anisotropic films.
Source Title: Physical Review B - Condensed Matter and Materials Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/107049
ISSN: 01631829
Appears in Collections:Staff Publications

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