Surfactant effect on the surface diffusion length in epitaxial growth.
Surfactant effect on the surface diffusion length in epitaxial growth.
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DOI：
10.1103/physrevb.48.8502
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发表时间：
1993-09
期刊：
影响因子：
--
通讯作者：
Massies;Grandjean
中科院分区：
文献类型：
--
作者：
Massies;Grandjean
结果表明，碲和铅，在GaAs的外延生长过程中，分别在表面偏析，减少和增加的表面扩散长度。这表明，在通用术语“表面活性剂”下，存在两种类型的表面分离物质，它们对表面扩散具有相反的影响。它建议，施加表面活性剂诱导的外延生长动力学的修改的关键参数是一个给定的对表面活性剂和生长材料的反应性。按照这种方法，它的结论是，表面活性剂占据间隙表面站点（非反应表面活性剂）增加的表面扩散长度，而表面活性剂在取代的网站（反应表面活性剂）减少它。
It is shown that Te and Pb, which segregate at the surface during the epitaxial growth of GaAs, respectively, decrease and increase the surface diffusion length. This indicates that under the generic term ''surfactant,'' there are two types of surface segregating species which have opposite effects on the surface diffusion. It is suggested that the key parameter which imposes the surfactant-induced modification of epitaxial growth kinetics is the reactivity of a given pair of surfactant and growing material. Following this approach, it is concluded that surfactants occupying interstitial surface sites (nonreacting surfactants) increase the surface diffusion length whereas surfactants in substitutional sites (reacting surfactants) decrease it.