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首页> 外文期刊>Nanoscale Research Letters >Spintronic Transport in Armchair Graphene Nanoribbon with Ferromagnetic Electrodes: Half-Metallic Properties
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Spintronic Transport in Armchair Graphene Nanoribbon with Ferromagnetic Electrodes: Half-Metallic Properties

机译:具有铁磁电极的扶手椅石墨烯纳米带中的自旋电子传输:半金属性质

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摘要

Utilizing first-principles theory, we demonstrate that half-metallicity can be realized in a junction composed of non-magnetic armchair graphene nanoribbon (AGNR) and ferromagnetic Ni electrodes. The half-metallic property originates from the AGNR energy gap of the up spin located at the Fermi energy, while large electronic states are generated for the down spin. By altering the interlayer distance and the contact area, namely, the strength of AGNR-Ni interaction, the efficiency of the spin filter becomes lower, since the energy gap moves away from the Fermi energy with the variation of charge transfer intensity.
机译:利用第一性原理,我们证明可以在由非磁性扶手椅石墨烯纳米带(AGNR)和铁磁性Ni电极组成的结中实现半金属化。半金属性质源自位于费米能上的自旋的AGNR能隙,而为自旋产生了大的电子态。通过改变层间距离和接触面积,即AGNR-Ni相互作用的强度,由于能隙随着电荷转移强度的变化而移离费米能量,自旋滤波器的效率降低。

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