Kinetic evolution and equilibrium morphology of strained islands.
Kinetic evolution and equilibrium morphology of strained islands.
复制标题
DOI：
10.1103/physrevlett.95.026103
复制
发表时间：
2005-07
影响因子：
8.6
通讯作者：
A. Rastelli;M. Stoffel;J. Tersoff;G. Kar;O. Schmidt
中科院分区：
文献类型：
--
作者：
A. Rastelli;M. Stoffel;J. Tersoff;G. Kar;O. Schmidt
在Si（001）上生长的自组装SiGe岛留下了特有的“足迹”，表明小岛缩小了，物质流失到附近的大岛上。{105}面形金字塔在缩小的过程中变成截形金字塔，最终变成无面形的土丘。岛屿生长过程中的相似行为表明，岛屿形状和小面形成是由热力学决定的。
Self-assembled SiGe islands grown on Si(001) leave behind characteristic "footprints" that reveal that small islands shrink, losing material to nearby larger islands. The critical size, dividing shrinking from growing islands, corresponds to the pyramid-to-dome shape transition, consistent with "anomalous coarsening" While shrinking, {105}-faceted pyramids transform into truncated pyramids and ultimately into unfaceted mounds. The similarity to behavior during island growth indicates that island shape and facet formation are thermodynamically determined.