کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10714007 | 1025564 | 2012 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of magnetic field and soft potential barrier on off-axis donor binding energy in a nanotube with two 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
چکیده انگلیسی
We analyze the effect of the magnetic field parallel to the axis and different potential shape on the ground-state binding energy of the off-axis donors in cylindrical nanotubes containing two GaAs/GaAlAs quantum wells (QWs) in a section of the tube layer. We express the wave function as a product of combinations of s and p subband wave functions and an envelope function that depends only on the electron-ion separation. By using the variational principle we derive a differential equation for the envelope function, which we solve numerically. Two peaks in the curves for the dependence of the ground-state binding energies on the donor distance from the axis are presented and it is shown that the increasing the magnetic field increasing the binding energy while the impurity is located in the QW1, whereas the opposite occurs when the impurity is located in the QW2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 407, Issue 24, 15 December 2012, Pages 4655-4659
Journal: Physica B: Condensed Matter - Volume 407, Issue 24, 15 December 2012, Pages 4655-4659
نویسندگان
Jesús D. González, F.J. Rondano, J. Barba-Ortega,