کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1543950 1512874 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Implementation of Kohn's theorem for the ellipsoidal quantum dot in the presence of external magnetic field
ترجمه فارسی عنوان
پیاده سازی قضیه کوهن برای نقطه کوانتومی بیضوی در حضور میدان مغناطیسی خارجی
کلمات کلیدی
قضیه کوهن، نقطه کوانتومی الیپساید
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی


• Oblate ellipsoidal quantum dot Kohn theorem Adiabatic approximation.
• Conditions occur to implement the generalized Kohn theorem for this system.
• The parabolic confinement potential depends on the geometry of the ellipsoid, which allows, together with the magnetic field to control resonance frequencies of transitions by changing the geometric dimensions of the QD.

An electron gas in a strongly oblated ellipsoidal quantum dot with impenetrable walls in the presence of external magnetic field is considered. Influence of the walls of the quantum dot is assumed to be so strong in the direction of the minor axis (the OZ axis) that the Coulomb interaction between electrons in this direction can be neglected and considered as two-dimensional. On the basis of geometric adiabaticity we show that in the case of a few-particle gas a powerful repulsive potential of the quantum dot walls has a parabolic form and localizes the gas in the geometric center of the structure. Due to this fact, conditions occur to implement the generalized Kohn theorem for this system. The parabolic confinement potential depends on the geometry of the ellipsoid, which allows, together with the magnetic field to control resonance frequencies of transitions by changing the geometric dimensions of the QD.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 75, January 2016, Pages 353–357
نویسندگان
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