کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1594684 | 1515686 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of concentration on magnetization in a diluted magnetic semiconductor quantum dot
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effects of concentration on magnetization in a diluted magnetic semiconductor quantum dot Effects of concentration on magnetization in a diluted magnetic semiconductor quantum dot](/preview/png/1594684.png)
چکیده انگلیسی
The donor bound spin polaron in a Cd1âxMnxTe quantum dot is investigated theoretically. Spin polaronic shifts are estimated using a mean field theory. Magnetization is calculated for various concentrations of Mn2+ ions with the dot sizes. The lowest binding energies in a diluted magnetic semiconductor of a Cd1âxMnxTe quantum dot are also estimated. Using the effective mass approximation, calculations are presented with and without spatial dependent effective masses. It is found that (i) the lowest binding energy decreases with the dot radius (ii) position dependent mass gives larger binding energy for smaller dots (iii) the ionization energy becomes more when spin interaction energy is included (iv) variation of increase in ionization energy is sharper for smaller dots with increase in concentration and (v) the magnetization of Mn subsystem increases when concentration of Mn2+ ions increases and it has appreciable changes for smaller dots.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 149, Issues 9â10, March 2009, Pages 412-416
Journal: Solid State Communications - Volume 149, Issues 9â10, March 2009, Pages 412-416
نویسندگان
A. John Peter, K. Lilly Mary Eucharista,