کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5396982 1505773 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electron density of states at the edge of the valence band of Cd0.88Fe0.12Se-A photoemission yield study
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Electron density of states at the edge of the valence band of Cd0.88Fe0.12Se-A photoemission yield study
چکیده انگلیسی
The electronic structures of Cd0.88Fe0.12Se and CdSe have been investigated by photoemission yield spectroscopy (PYS) in the photon energy range from 5 to 12 eV. The (112¯0) surfaces were obtained by cleavage under ultrahigh vacuum (UHV) conditions. An Fe-related emission appeared at 0.58 eV above the valence band edge. The freshly cleaved surface of Cd0.88Fe0.12Se interacted with ambient atmosphere more strongly than CdSe crystal. Leaving the sample in an UHV chamber at room temperature enabled us to identify surface related features and to observe decrease of the ionization energy Ei, energy threshold Ed and the crystal affinity χ due to change of the surface conditions. Effective density of states, derived from the experimental spectra of Cd0.88Fe0.12Se exhibits, in contrast with CdSe, a surface-related feature degenerated with the bulk valence band.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 160, Issues 1–3, August 2007, Pages 58-61
نویسندگان
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