کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1861121 | 1037487 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Voltage-controllable spin-polarized transport through parallel-coupled double quantum dots with Rashba spin-orbit interaction
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Voltage-controllable spin-polarized transport through parallel-coupled double quantum dots with Rashba spin-orbit interaction Voltage-controllable spin-polarized transport through parallel-coupled double quantum dots with Rashba spin-orbit interaction](/preview/png/1861121.png)
چکیده انگلیسی
A spin device, consisting of parallel-coupled double quantum dots and three normal metal leads, is proposed to realize spin-polarized current without the help of magnetic field and magnetic material. Based on the Keldysh nonequilibrium Green function technique and equation of motion method, the spin-dependent current formula in each lead is derived. It is shown that not only a fully polarized current but also a tunable pure spin current can be obtained by modulating the structure parameters, strength of Rashba spin-orbit interaction and bias voltages properly. It further demonstrates the dependence of the spin-polarized current on the strength of the Rashba spin-orbit interaction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 373, Issue 2, 5 January 2009, Pages 285-291
Journal: Physics Letters A - Volume 373, Issue 2, 5 January 2009, Pages 285-291
نویسندگان
Hai-Tao Yin, Tian-Quan Lü, Xiao-Jie Liu, Hui-Jie Xue,