1. Controllable spin transport in dual-gated silicene.
- Author
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Yu Wang and Yiyi Lou
- Subjects
- *
SILICON , *RESONANT tunneling , *POLARIZED beams (Nuclear physics) , *SPIN polarization , *ELECTRIC fields , *QUANTUM wells - Abstract
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. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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