کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1552841 | 1513212 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural asymmetry induced size quantized nonmonotonous electron mobility in GaAs/AlxGa1âxAs double quantum well structure
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We show that nonmonotonic enhancement of low temperature electron mobility μ can be achieved in GaAs/AlxGa1âxAs barrier delta doped double quantum well structure under double subband occupancy. We vary the well widths asymmetrically by shifting the position of the central barrier and analyze its effect on the multisubband electron mobility taking different doping profiles. It is gratifying to show that when there is delta doping in one of the side barriers, a hump in μ is achieved as a function of the well width which enhances with increase in the width of the central barrier. On the other hand, when both the side barriers are symmetrically doped, a dip in μ is exhibitted which increases with increase in the doping concentration. In the former case, the mobility is mostly contributed from the higher subband limited by the ionized impurity scattering. Whereas, in the later case, the wavy nature of mobility is due to the drastic variation of subband mobilities through the interface roughness scattering.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Superlattices and Microstructures - Volume 89, January 2016, Pages 75-82
Journal: Superlattices and Microstructures - Volume 89, January 2016, Pages 75-82
نویسندگان
R.K. Nayak, S. Das, A.K. Panda, T. Sahu,