摘要
We propose a highly efficient dual spin-valley filter in silicene, consisting of two distinct regions. In the first region, angular separation of the two valley spins in momentum-space is induced by a uniaxial strain, with further spin separation induced by an exchange field. The second region acts as an extractor of the requisite spin-valley current by means of localized fringe magnetic fields and gate modulation of the electrical potential. We demonstrate controllable and highly efficient filtering (exceeding 90-) for all four spin-valley combinations based on realistic parameter values. We also discuss the feasibility of a practical silicene-based spin-valley filter.
原文 | English |
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文章編號 | 105201 |
期刊 | Applied Physics Express |
卷 | 8 |
發行號 | 10 |
DOIs | |
出版狀態 | Published - 1 10月 2015 |