کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1595370 | 1515720 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impurity-host interactions in Cr-substituted ZnSe
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The physics of charge-transfer processes in semiconductors is a challenging and longstanding problem. Focusing on Cr-substituted ZnSe semiconductors, important for optoelectronic and spintronic devices, several processes and their energetics are analysed using first-principles. In contrast to the properties exhibited by deep gap levels, our results for highly Cr doped ZnSe show small variations in the equilibrium configurations, forces and electronic density around the Cr for different charge states. Therefore, the delocalization of the electronic charge between the impurity and host leads to a decrease of the effective Coulomb repulsion and becomes then the fundamental mechanism to inhibit nonradiative recombination via multiphonon emission for the modes studied.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 143, Issues 8â9, August 2007, Pages 399-402
Journal: Solid State Communications - Volume 143, Issues 8â9, August 2007, Pages 399-402
نویسندگان
C. Tablero,