کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5395766 1505729 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental evidence for two-dimensional states localized in subsurface region of Ge(1 1 1)
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Experimental evidence for two-dimensional states localized in subsurface region of Ge(1 1 1)
چکیده انگلیسی
The present study gives experimental evidence of two-dimensional electronic states localized in subsurface layers of a Ge(1 1 1) substrate, in which a monolayer of Pb adsorbed on a Ge(1 1 1) surface is used as a template. We observed three pairs of the subsurface states by angle-resolved photoelectron spectroscopy, which are closely related to bulk heavy-hole, light-hole and spin-orbit split-off bands of Ge(1 1 1). The heavy-hole- and light-hole-derived bands show the Rashba-type band crossing at the Γ¯ point. A density functional theory calculation suggests that the branches of these bands exhibit the Rashba-type spin splitting. On the other hand, we observed peculiar spin polarization for the subsurface states attributed to the bulk spin-orbit split-off band by spin- and angle-resolved photoelectron spectroscopy, where spin polarization of each branch is inverted with respect to Γ¯ and the degeneracy, expected for a normal Rashba spin-split surface state is lifted at Γ¯.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 201, May 2015, Pages 92-97
نویسندگان
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