کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1545655 | 997598 | 2010 | 5 صفحه PDF | دانلود رایگان |
In this paper we present a calculation of the binding energy of a donor impurity in a cylindrical GaAs-Ga0.6Al0.4As quantum well wire (QWW) as a function of an applied magnetic field for different wire radii and different positions of the donor. The model considers an infinite length QWW with a carrier that is confined laterally by a parabolic potential and the presence of a uniform magnetic field applied parallel to the wire axis. The 1s-like impurity state is considered using the effective-mass approximation within the variational approach. We found that for a given wire radius the binding energy of the impurity increases with the magnetic field and that for a given magnetic field value it decreases with wire radius. Our results are in good agreement with previous theoretical reports.
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 42, Issue 9, July 2010, Pages 2436–2440