Influences of misfit strains on liquid phase heteroepitaxial growth |
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| Institution: | 1. School of Computer Science, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China;2. School of Science, East China Jiaotong University, Nanchang 330013, China;1. Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran;2. Modern Manufacturing Technologies Research Center, Najafabad Branch, Islamic Azad University, Najafabad, Iran;1. Benemérita Universidad Autónoma de Puebla, Facultad de Ingeniería Química, Ciudad Universitaria, San Manuel, Puebla, Código Postal 72570, Mexico;2. Universidad de Santiago de Chile, Facultad de Química y Biología, Laboratorio de Química Teórica, Santiago, Chile;3. Benemérita Universidad Autónoma de Puebla, Facultad de Ingeniería, Apdo. Postal J-39, Puebla, Pue. 72570, Mexico;4. Universidad Nacional Autónoma de México-Departamento de Física y Química Teórica, DEPg-Facultad de Química, México D.F., C.P. 04510, Mexico |
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| Abstract: | Influences of misfit strains with different signs on liquid phase heteroepitaxial growth are studied by binary phase field crystal model. It is amazing to find that double islands are formed because of lateral and vertical separation. The morphological evolution of epitaxial layer depends on signs of misfit strains. The maximum atomic layer thickness of double islands under negative misfit strain is larger than that of under positive misfit strain at the same evolutional time, and size differences between light and dark islands is much smaller under negative misfit strain than that of under positive misfit strain. In addition, concentration field and density field approximately have similar variational law along x direction under the same misfit strain but show opposite variational trend under misfit strains with different signs. Generally, free energy of epitaxial growth systems keeps similar variational trend under misfit strains with different signs. |
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| Keywords: | Binary PFC Liquid phase epitaxial Misfit strains with different signs Double islands |
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