کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5370377 1388488 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ellipsometric investigation of optical constant and energy band gap of Zn1−xMnxSe/GaAs (1 0 0) epilayers
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Ellipsometric investigation of optical constant and energy band gap of Zn1−xMnxSe/GaAs (1 0 0) epilayers
چکیده انگلیسی

Zn1−xMnxSe/GaAs (1 0 0) epilayers were grown using a hot-wall epitaxy method. The spectroscopic ellipsometry was used to determine the optical dielectric constant. The obtained pseudodielectric function spectra revealed the distinct structures at energies of E0, E0 + Δ0, E1, E1 + Δ1, E2 and E0′ + Δ0 critical points (CPs) at lower Mn composition range. These critical points were determined by analytical line-shapes fitted to numerically calculated derivatives of their pseudodielectric functions. The peak characteristics were changed with the change in Mn composition. The spectral dependence of pseudodielectric function 〈ɛ〉 was used to obtain the fundamental energy gaps E0 including a unique relation with Mn composition. Also, the shifting and broadening of the CPs were observed with increasing Mn composition.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 252, Issue 16, 15 June 2006, Pages 5745-5751
نویسندگان
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