کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10727623 1037666 2015 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Control of spin-polarised currents in graphene nanorings
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
Control of spin-polarised currents in graphene nanorings
چکیده انگلیسی
We study electronic transport in systems comprising square graphene nanorings with a ferromagnetic insulator layer on top of them. The rings are connected symmetrically or asymmetrically to contacts. The proximity exchange interaction of electrons with magnetic ions results in spin-dependent transport properties. When a nanoring is connected asymmetrically, the occurrence of Fano-like antiresonances in the transmission coefficient can induce abrupt changes in the spin polarisation under minute variations of the Fermi energy. We also demonstrate that the spin polarisation can be efficiently controlled by a side-gate voltage. This opens a possibility to use these effects for fabricating tunable sources of polarised electrons.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 379, Issue 36, 25 September 2015, Pages 2102-2105
نویسندگان
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