کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9594876 1395913 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
First-principles study on field evaporation of surface atoms from W(0 1 1) and Mo(0 1 1) surfaces
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
First-principles study on field evaporation of surface atoms from W(0 1 1) and Mo(0 1 1) surfaces
چکیده انگلیسی
The simulations of field-evaporation processes for surface atoms on W(0 1 1) and Mo(0 1 1) surfaces are implemented using first-principles calculations based on the real-space finite-difference method. The threshold values of the external electric field for evaporation of the surface atoms, which are ∼6 V/Å for tungsten and ∼5 V/Å for molybdenum, are in agreement with the experimental results. While the threshold value of the electric field and the local-field enhancement around the evaporating atoms agree with those expected from the conclusion of the previous study using structureless jellium, the induced charge around the surface atom has a significant difference from that obtained by the jellium model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 577, Issue 1, 20 February 2005, Pages 42-46
نویسندگان
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