کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1545815 997602 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Singlet-triplet transitions in highly correlated nanowire quantum dots
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Singlet-triplet transitions in highly correlated nanowire quantum dots
چکیده انگلیسی
We consider a quantum dot embedded in a three-dimensional nanowire with tunable aspect ratio a. A configuration interaction theory is developed to calculate the energy spectra of the finite 1D quantum dot systems charged with two electrons in the presence of magnetic fields B along the wire axis. Fruitful singlet-triplet transition behaviors are revealed and explained in terms of the competing exchange interaction, correlation interaction, and spin-Zeeman energy. In the high aspect ratio regime, the singlet-triplet transitions are shown designable by tuning the parameters a and B. The transition also manifest the highly correlated nature of long nanowire quantum dots.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 42, Issue 4, February 2010, Pages 837-840
نویسندگان
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