کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1595809 | 1515696 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Analytic expression for electronic density of states in random media with weak scattering potential
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
We evaluate the electronic density of states (DOS) in random media by using the expression from the variational path integral theory. The scattering potential is modeled by a Gaussian function. By imposing the limit of weak scattering, the full spectrum DOS can be approximated by an analytical method. The solution has several features; in the extended states, it is essentially proportional to E. In the localized states, it resembles an exponential tail. However, this tail has less population than that of the compatible Kane DOS. The total energy of the system is lowered by Eα, depending linearly on the density of scatterers. Our results give good description to the photoluminescence spectra of Si:P and the tunneling measurement of GaAs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 148, Issues 1â2, October 2008, Pages 42-45
Journal: Solid State Communications - Volume 148, Issues 1â2, October 2008, Pages 42-45
نویسندگان
Udomsilp Pinsook, Virulh Sa-yakanit,