The paper deals with the properties of octagraphene nanoribbon determined in terms of the local spin density approximation and nonequilibrium Green’s function, namely transmission spectra, current–voltage characteristics (I–V curves), and differential conductivity of the zigzag-edged octagraphene nanoribbon obtained after the removal of carbon atoms from its center and saturation with hydrogen atoms. The I–V curves are characterized by a section with negative differential resistance caused by the resonant-tunneling of quasiparticles. The dI/dV curve shows similar changes. It is found that in the zigzag-edged octagraphene nanoribbon (with the network consisting of hexagons and a carbon bridge), spin-down quasiparticles are blocked in the energy range from –1.65 to –0.5 eV. This behavior of the transmission spectrum allows octagraphene nanoribbons to be applied in creation of energy spin filters. It is shown that the spin-polarized current in zigzag-edged octagraphene nanoribbon (with the network consisting of pentagons and a carbon bridge) with spin-up quasiparticles significantly exceeds the current in that with spin-up and spin-down quasiparticles. This effect allows the selection of spin-up quasiparticles at a certain voltage applied. The obtained results can be useful in the new developments of spintronic devices.

中文翻译：

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氢原子饱和的锯齿形边缘八石墨烯纳米带自旋过滤性能的计算机模拟

该论文讨论了根据局部自旋密度近似和非平衡格林函数确定的八石墨烯纳米带的特性，即透射光谱、电流 - 电压特性（I-V 曲线）和之后获得的锯齿形边缘八石墨烯纳米带的微分电导率。从其中心去除碳原子并用氢原子饱和。I-V 曲线的特征在于具有由准粒子的共振隧道引起的负微分电阻的部分。dI/dV 曲线显示了类似的变化。发现在锯齿形边缘的八石墨烯纳米带（具有由六边形和碳桥组成的网络）中，自旋向下的准粒子在–1.65 到–0.5 eV 的能量范围内被阻止。透射光谱的这种行为允许八石墨烯纳米带用于创建能量自旋过滤器。结果表明，具有自旋向上准粒子的锯齿形边缘八石墨烯纳米带（具有由五边形和碳桥组成的网络）中的自旋极化电流显着超过具有自旋向上和自旋向下准粒子的电流。这种效应允许在施加的特定电压下选择自旋准粒子。获得的结果可用于自旋电子器件的新发展。结果表明，具有自旋向上准粒子的锯齿形边缘八石墨烯纳米带（具有由五边形和碳桥组成的网络）中的自旋极化电流显着超过具有自旋向上和自旋向下准粒子的电流。这种效应允许在施加的特定电压下选择自旋准粒子。获得的结果可用于自旋电子器件的新发展。结果表明，具有自旋向上准粒子的锯齿形边缘八石墨烯纳米带（具有由五边形和碳桥组成的网络）中的自旋极化电流显着超过具有自旋向上和自旋向下准粒子的电流。这种效应允许在施加的特定电压下选择自旋准粒子。获得的结果可用于自旋电子器件的新发展。