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Effect of electric field on the electronic and magnetic properties of a graphene nanoribbon/aluminium nitride bilayer system

机译：电场对石墨烯纳米带/氮化铝双层体系电子和磁性的影响

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摘要

The effect of an external electric field on the electronic and magnetic properties of the heterostructure of zigzag graphene nanoribbons (ZGNRs) placed on an aluminium nitride nanosheet (AlNNS) is studied using density functional theory (DFT). DFT calculations show that the local magnetic moments and total magnetization of the edge carbon atoms in the 4-ZGNR/AlNNS with a spin up electron subsystem are strongly dependent on a transverse electric field. We can control the band gap of the 4-ZGNR/AlNNS by using an external electric field. We established the critical values of the transverse electric field providing for semiconductor-metal phase transition in spin down electron configuration, which opens up potential opportunities for applications in spintronics devices. The effect of an external electric field (both amplitude and direction) on the effective charge and formation of the interface state energy is also studied and discussed.
机译：使用密度泛函理论（DFT）研究了外部电场对置于氮化铝纳米片（AlNNS）上的之字形石墨烯纳米带（ZGNRs）异质结构的电子和磁性的影响。 DFT计算表明，带有自旋电子子系统的4-ZGNR / AlNNS中边缘碳原子的局部磁矩和总磁化强度强烈依赖于横向电场。我们可以通过使用外部电场来控制4-ZGNR / AlNNS的带隙。我们确定了在旋转电子结构中为半导体-金属相变提供的横向电场的临界值，这为自旋电子器件的应用打开了潜在机会。还研究和讨论了外部电场（幅度和方向）对有效电荷和界面态能量形成的影响。

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