High resolution electron microscopy of GaAs capped GaSb nanostructures
High resolution electron microscopy of GaAs capped GaSb nanostructures
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GaAs 覆盖的 GaSb 纳米结构的高分辨率电子显微镜
DOI:
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发表时间:
2009
影响因子:
4
通讯作者:
M. Chisholm
中科院分区:
文献类型:
--
作者:
S. Molina;A. Beltrán;T. Ben;P. Galindo;E. Guerrero;A. Taboada;J. M. Ripalda;M. Chisholm
We show in this work that GaAs capping of 2 ML of GaSb grown by molecular beam epitaxy results in the formation of very small (with heights of about 1 nm) GaAsxSb1−x nanostructures surrounded by a GaAs rich layer. This conclusion is obtained by analyzing the morphology of the GaAsxSb1−x nanostructures by high resolution scanning transmission electron microscopy in Z-contrast mode. This result shows that a significant fraction of the Sb atoms must segregate along the growth direction during the GaAs capping process.