کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10642390 997653 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Periodic inversion of tunneling magnetoresistance through Coulomb blockaded quantum dots
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Periodic inversion of tunneling magnetoresistance through Coulomb blockaded quantum dots
چکیده انگلیسی
Green's function approach is used to study the tunneling magnetoresistance (TMR) through a nonmagnetic quantum dot, which is coupled asymmetrically to two ferromagnetic leads. We predict a remarkable oscillation effect of the TMR in both sign and magnitude. As the gate voltage varies, the TMR is inverted periodically at each Coulomb peak of conductance, and it retains the normal sign in the Coulomb blockade valleys. The magnitude of the inverse TMR can be tuned to be as large as that of the normal TMR. The oscillation effect is attributed to the quantizations of both electronic charge and energy in the dot.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 28, Issue 3, August 2005, Pages 257-263
نویسندگان
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