کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8154163 | 1524772 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Aharonov-Casher effect and quantum transport in graphene based nano rings: A self-consistent Born approximation
ترجمه فارسی عنوان
تأثیر اثر آرونوف کاسر و انتقال کوانتومی در حلقه های نانو بر پایه گرافن: تقریبی متشکل از خود سازگار
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کلمات کلیدی
تأثیر آرونوف کاشیر، حمل و نقل کوانتومی، گرافن، حلقه نانو،
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
چکیده انگلیسی
In this study, Rashba coupling induced Aharonov-Casher effect in a graphene based nano ring is investigated theoretically. The graphene based nano ring is considered as a central device connected to semi-infinite graphene nano ribbons. In the presence of the Rashba spin-orbit interaction, two armchair shaped edge nano ribbons are considered as semi-infinite leads. The non-equilibrium Green's function approach is utilized to obtain the quantum transport characteristics of the system. The relaxation and dephasing mechanisms within the self-consistent Born approximation is scrutinized. The Lopez-Sancho method is also applied to obtain the self-energy of the leads. We unveil that the non-equilibrium current of the system possesses measurable Aharonov-Casher oscillations with respect to the Rashba coupling strength. In addition, we have observed the same oscillations in dilute impurity regimes in which amplitude of the oscillations is shown to be suppressed as a result of the relaxations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 449, 1 March 2018, Pages 485-492
Journal: Journal of Magnetism and Magnetic Materials - Volume 449, 1 March 2018, Pages 485-492
نویسندگان
A. Ghaderzadeh, S.H. Ebrahimnazhad Rahbari, A. Phirouznia,