کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1859864 | 1037385 | 2014 | 5 صفحه PDF | دانلود رایگان |
• Dual-gated silicene forms a lateral spin-resonant tunneling diode.
• Resonant spin polarization can be electrically modulated in the concerned spin-RTD.
• Dual-gated silicene can be used as beam-dependent spin/valley filter.
Based on the dual-gated silicene, we have evaluated theoretically the spin-dependent transport in lateral resonant tunneling structure. By aligning the completely valley-polarized beam with spin-resolved well state in concerned structure, large spin polarization can be expected owing to spin-dependent resonant tunneling mechanism. Under the gate electric field modulation, the forming quantum well state can be externally manipulated, triggering further the emergence of externally-controllable spin polarization. Importantly, integrating the considered structure with a proper valley-filter, which might be constructed from valley-contrasting physics as that in graphene valleytronics, completely-polarized spin beam can also be attained without the assistance of ferromagnetic component, providing thus some profitable strategies to develop nonmagnetic spintronic devices residing on silicene.
Journal: Physics Letters A - Volume 378, Issue 35, 11 July 2014, Pages 2627–2631