کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1860901 | 1530561 | 2015 | 6 صفحه PDF | دانلود رایگان |
• We have investigated the spin-dependent transport properties of the H2–5(6)ZGNR–H devices with B/N doping in both ZGNR electrodes.
• A perfect bipolar spin-filtering effect can be obtained in 5(6)ZGNR-based hetero-structures with P and AP magnetic configurations.
• The graphene-based diode can be attained by manipulating the doping positions of B or N atoms in both electrodes.
The spin transport properties of zigzag graphene nanoribbon (ZGNR) hetero-junctions, in which ZGNR electrodes are doped with B or N atoms, are investigated based on spin-polarized density functional theory and non-equilibrium Green's function. ZGNRs are C–H2 bonded at one edge and C–H bonded at the other edge to form asymmetric edge hydrogenation. The spin-polarized currents of ZGNR-based nano-devices with an odd or even number of the zigzag-shaped chains show a perfect bipolar spin-filtering effect on parallel and anti-parallel magnetic configurations. This study provides insights into the design of high-performance graphene-based spin filters.
Journal: Physics Letters A - Volume 379, Issues 43–44, 6 November 2015, Pages 2860–2865