کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9595054 | 1507973 | 2005 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Three-dimensional elastic lattice model of heteroepitaxy
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
If the overlayer consists of two adatoms at a separation r, they interact asymptotically with a repulsive energy proportional to râ3, in agreement to the continuum elasticity theory but with a strength weakened due to the atomic relaxation. If the overlayer consists of two parallel steps with alternating signs, the interaction is proportional to the logarithm of the separation, and depends strongly on the softness of the substrate. As the substrate softens, steps around monolayer islands induce strong island repulsion. If an island becomes three-dimensional, its large portion relaxes to recover its natural lattice constant. The force balances for an island, but the force dipole remains to produce a repulsive interaction between two islands which decays as râ3, similar to the adatom interaction. The interaction strength, however, is large, proportional to the product of two island sizes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 586, Issues 1â3, 20 July 2005, Pages 83-95
Journal: Surface Science - Volume 586, Issues 1â3, 20 July 2005, Pages 83-95
نویسندگان
Yukio Saito,