کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5496375 1399845 2017 27 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Strain control of real- and lattice-spin currents in a silicene junction
ترجمه فارسی عنوان
کنترل فشار بر جریانهای واقعی و شبکه ای در یک اتصال سیلیکن
کلمات کلیدی
سیلیکن، اسپینترونیکس، عایق توپولوژیک 2 بعدی، سنسور فشار،
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
چکیده انگلیسی
We investigate real- and lattice-spin currents controlled by strain in a silicene-based junction, where chemical potential, perpendicular electric field and circularly polarized light are applied into the strained barrier. We find that the junction yields strain filtering effect with perfect strain control of real- (or lattice-)spin currents. (i) By applying electric field without circularly polarized light we show that total current is carried by pure lattice-spin up (or down) electrons tunable by strain. (ii) When circularly polarized light is irradiated onto silicene sheet without applying electric field, total current is carried by pure real-spin up (or down) electrons tunable by strain. High conductance peaks associated with pure real- (or lattice-)spin currents in case ii (or i) occur at specific magnitude of strain, yielding strain filtering effect. Magnitudes of filtered strain due to pure real- (or lattice-) spin currents may be tunable by varying chemical potential. Sensitivity may be enhanced by increasing thickness of strained barrier. Significantly, (iii) when both perpendicular electric field and circularly polarized light are applied, the total current is carried by three species of electron groups tunable by strain. This may lead to controllable numbers of electron species to transport. This result shows that strain filtering effect in a silicene-based junction is quite different from that in graphene junction. Our work reveals potential of silicene as a nano-electro-mechanical device and spin-valleytronic applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 381, Issue 33, 5 September 2017, Pages 2754-2760
نویسندگان
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