کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1866757 | 1038049 | 2015 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Spin-polarized current produced by graphene superlattice Spin-polarized current produced by graphene superlattice](/preview/png/1866757.png)
• We investigate the spin-dependent current for magnetic graphene superlattice.
• The spin polarization depends on the Rashba spin–orbit interaction and magnetic field.
• The angular range of the spin-inversion depends on the number of magnetic barriers.
• The spin current has a gap, which increase by increasing the number of barriers.
We study spin transport through a magnetic graphene superlattice in the presence of Rashba spin–orbit interaction (RSOI) modulated by a homogeneous constant electric field. It is found that RSOI alone cannot generate spin-polarized current, but when magnetic field combines with the RSOI, the spin-polarized current can be observed and increases by increasing the magnetic field. In addition, the efficiency of spin-inversion can be efficiently controlled by the number of barriers. As the number of magnetic barriers increases, the angular range of the spin transmission coefficients without spin-flip and with spin-flip decrease, the gaps in spin transmission coefficients and the spin-dependent current versus external electric field become wider.
Journal: Physics Letters A - Volume 379, Issue 39, 16 October 2015, Pages 2506–2510