کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9837613 | 1525281 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrostatic pressure effects on donor-related absorption spectra in GaAs-Ga1âxAlxAs quantum wells
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Hydrostatic pressure effects on donor-related absorption spectra in GaAs-Ga1âxAlxAs quantum wells Hydrostatic pressure effects on donor-related absorption spectra in GaAs-Ga1âxAlxAs quantum wells](/preview/png/9837613.png)
چکیده انگلیسی
In this paper, the effects of hydrostatic stress on the density of donor impurity states and donor-related optical absorption spectra in a GaAs-Ga1âxAlxAs quantum wells are obtained. We calculate the shallow-donor binding energy for different well widths and different values of hydrostatic stress. We find that for large well widths the binding energy increases slowly with hydrostatic stress, as opposed to the behavior of the binding energy for wells with small width. One of the results shows that the binding energy does not change appreciably with the impurity position when the width of the well is small and the hydrostatic stress is high. Two structures in both, the density of states and the optical absorption spectra, associated with impurities located close to the center and to the edges of the structure, are obtained. We have also observed that the density of states and the optical absorption spectra depend strongly on the applied hydrostatic stress.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 362, Issues 1â4, 15 May 2005, Pages 41-49
Journal: Physica B: Condensed Matter - Volume 362, Issues 1â4, 15 May 2005, Pages 41-49
نویسندگان
S.Y. López, N. Porras-Montenegro, C.A. Duque,