کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5424291 1395818 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Growth mode and novel structure of ultra-thin KCl layers on the Si(1 0 0)-2 × 1 surface
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Growth mode and novel structure of ultra-thin KCl layers on the Si(1 0 0)-2 × 1 surface
چکیده انگلیسی
This study investigates ultra-thin potassium chloride (KCl) films on the Si(1 0 0)-2 × 1 surfaces at near room temperature. The atomic structure and growth mode of this ionic solid film on the covalent bonded semiconductor surface is examined by synchrotron radiation core level photoemission, scanning tunneling microscopy and ab initio calculations. The Si 2p, K 3p and Cl 2p core level spectra together indicate that adsorbed KCl molecules at submonolayer coverage partially dissociate and that KCl overlayers above one monolayer (ML) have similar features in the valance band density of states as those of the bulk KCl crystal. STM results reveal a novel c(4 × 4) structure at 1 ML coverage. Ab initio calculations show that a model that comprises a periodic pyramidal geometry is consistent with experimental results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 603, Issue 2, 15 January 2009, Pages 419-424
نویسندگان
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