Efficient dual spin-valley filter in strained silicene

Can Yesilyurt; Seng Ghee Tan; Gengchiau Liang; Mansoor B.A. Jalil

doi:10.7567/APEX.8.105201

Efficient dual spin-valley filter in strained silicene

Can Yesilyurt, Seng Ghee Tan, Gengchiau Liang, Mansoor B.A. Jalil

Institute of Pioneer Semiconductor Innovation

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33 Scopus citations

Abstract

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.

Original language	English
Article number	105201
Journal	Applied Physics Express
Volume	8
Issue number	10
DOIs	https://doi.org/10.7567/APEX.8.105201
State	Published - 1 Oct 2015

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AU - Tan, Seng Ghee

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PY - 2015/10/1

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N2 - 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.

AB - 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.

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Efficient dual spin-valley filter in strained silicene

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