| نویسندگان | روح اله فرقدان-علیرضا صفارزاده |
|---|---|
| نشریه | Applied Physics Letter 98, 023106 (2011) Highlighted in Virtual Journal of Nanoscale Science & Technology, volume 23, Issue 3 Highlighted in science news in Eurekalert (Science news of the American Association for the Advancement of Science) |
| نوع مقاله | Full Paper |
| تاریخ انتشار | ۲۰۱۰-۱۲-۰۱ |
| رتبه نشریه | علمی - پژوهشی |
| نوع نشریه | چاپی |
| کشور محل چاپ | ایران |
| نمایه نشریه | ISI |
چکیده مقاله
The coherent spin-polarized electron transport through a zigzag-edge graphene flake ZGF, sandwiched between two semi-infinite armchair graphene nanoribbons, is investigated by means of Landauer–Buttiker formalism. To study the edge magnetism of the ZGF, we use the half-filled Hubbard model within the Hartree–Fock approximation. The results show that the junction acts as a spin filter with high degree of spin polarization in the absence of magnetic electrodes and external fields. By applying a gate voltage the spin-filtering efficiency of this device can be effectively controlled and the spin polarization can reach values as high as 90%.