کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5425840 1395867 2006 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Scattering of Cu(1 0 0) image state electrons from single Cu adatoms and vacancies: A comparative study
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Scattering of Cu(1 0 0) image state electrons from single Cu adatoms and vacancies: A comparative study
چکیده انگلیسی

A theoretical study of the electron dynamics in image potential states on Cu(1 0 0) surfaces with different types of defects (Cu adatoms and Cu vacancies) is presented for low defect density at the surface. A wave packet propagation approach is employed for the electron scattering calculations, where the defect induced potentials are obtained from an ab initio density functional study. Scattering of the image state electron by a defect induces inter-band and intra-band transitions leading, respectively, to the population decay and to the dephasing of the image states. Comparison of the respective effects of adatoms and vacancies shows that Cu adatoms are much more efficient in inducing population decay and dephasing of the image potential states. Present results for the case of Cu adatoms are compared with available time-resolved two-photon photoemission data.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 600, Issue 10, 15 May 2006, Pages 2184-2194
نویسندگان
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