کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5422197 1507906 2014 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of atomic positions in silicene on Ag(111) by low-energy electron diffraction
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Determination of atomic positions in silicene on Ag(111) by low-energy electron diffraction
چکیده انگلیسی
We have investigated the structure of silicene forming into the (4 × 4) superstructure on Ag(111) by using the low-energy electron diffraction. We found that Si atoms form a buckled honeycomb structure on Ag(111), which fully matches with the structure optimized with the density functional theory calculations. The SiSi bond lengths range from 2.29 to 2.31 Å, which are close to the upper limit of SiSi double bond and shorter than the bond length in the bulk diamond structure. The buckling in the silicene layer causes the displacement of Ag atoms in the first substrate layer with 0.3 Å perpendicular to the surface, which is a compelling evidence of the strong couplings at the interface between the silicene and the substrate.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 623, May 2014, Pages 25-28
نویسندگان
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