کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5426390 1395889 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Theoretical STM images of alkaline-earth metal adsorbed Si(1 1 1)3 Ã— 2 surfaces
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Theoretical STM images of alkaline-earth metal adsorbed Si(1 1 1)3 Ã— 2 surfaces
چکیده انگلیسی

We have performed total-energy calculations to study theoretical scanning tunneling microscopy (STM) images of the Si(1 1 1)3 × 2 surfaces induced by the adsorption of alkaline-earth metals (AEMs). Previously, in a series of works on Ba/Si(1 1 1) system, we have found that the observed Si(1 1 1)3 × 1-Ba LEED phase indeed has a 3 × 2 periodicity with a Ba coverage of 1/6 ML and the HCC substrate structure. Based on results of the Ba case, we proposed that the HCC structure is also adopted for other AEM atoms, which was confirmed by our recent work. In this paper, we mainly report the STM simulations for different AEM systems to compare with existing experimental data. We discuss the difference in the detailed STM images for different AEM adsorbates. Especially, the difference in filled-state images between Mg and other AEM atoms is attributed to the strong Mg-Si interaction.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 600, Issue 18, 15 September 2006, Pages 3606-3609
نویسندگان
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