کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1616807 1005670 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An XANES and XES investigation of the electronic structure of indium rich InxGa1−xN films
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
An XANES and XES investigation of the electronic structure of indium rich InxGa1−xN films
چکیده انگلیسی

The electronic structure of InGaN epitaxial layers grown on sapphire substrates was studied using X-ray absorption at the In L3 and N K edges, as well as N Kα X-ray emission. Knowing that the InGaN crystallizes in an anisotropic wurtzite structure, the linear polarization of synchrotron radiation was exploited to estimate the influence of the crystal structure anisotropy on the distribution of the local density of states at the site of In and N. The calculated partial density of states describes the observed anisotropy in the measured spectra. Influence of the core–hole effect on the analyzed absorption spectra was verified and reveal that a core hole potential is effectively screened by the surface mobile electrons for the sample with maximum indium content. The bandgap values were provided for the investigated InGaN alloys and were found to vary preudo-lineary with indium content.


► The XANES measurements were done with taking into account polarization effect of SR
► Influence of the core–hole effect on the analyzed absorption spectra was verified
► The bandgap values for the InGaN alloys were found to vary preudo-lineary with xIn.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 509, Issue 39, 29 September 2011, Pages 9528–9535
نویسندگان
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