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(0Â 1Â 1) and Mo(0Â 1Â 1) surfaces
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The simulations of field-evaporation processes for surface atoms on W(0Â 1Â 1) and Mo(0Â 1Â 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 â¼6Â V/Ã
for tungsten and â¼5Â V/Ã
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
Journal: Surface Science - Volume 577, Issue 1, 20 February 2005, Pages 42-46
نویسندگان
Tomoya Ono, Takashi Sasaki, Jun Otsuka, Kikuji Hirose,