论文标题
通过在纯石墨烯扶手椅纳米骨架中通过边缘重建创建量子旋转链，向弹道旋转运输
Creating quantum spin chains through edge reconstruction in pure graphene armchair nanoribbons towards ballistic spin transport
论文作者
论文摘要
众所周知，可以沿着曲折的石墨烯纳米纤维边缘实现铁磁性，但是扶手椅石墨烯纳米纤维边缘（AGNES）是非磁性的。在这里，我们通过沿艾格尼丝（Agnes）的边缘重建实现了海森贝格（Heisenberg）抗铁磁旋转链。重建的边缘由五边形碳环或五角形和六角形碳环的混合体组成。最终的纳米纤维是狭窄的半导体，带边缘状态是自旋排优边状态或非磁性块状状态。自旋位于五边形环的最外部碳上，旋转间交换是最近的邻居抗铁磁相互作用。对于有限的链长或非零磁化，有非零的自旋DIRD重量，因此可以沿重建的边缘实现弹道量子自旋传输，这些量子可用于量子自旋信息传输和自旋式应用。
It is well-known that ferromagnetism can be realized along the zigzag graphene nanoribbon edges, but the armchair graphene nanoribbon edges (AGNEs) are nonmagnetic. Here, we achieve Heisenberg antiferromagnetic spin chains through edge reconstruction along the AGNEs. The reconstructed edge consists of pentagonal carbon rings or a hybrid of pentagonal and hexagonal carbon rings. The resultant nanoribbons are narrow-gap semiconductors and the band edge states are either spin-degenerate edge states or nonmagnetic bulk states. The spin is located on the outermost carbon of the pentagonal ring, and the inter-spin exchange is the nearest-neighbor antiferromagnetic interaction. For finite chain lengthes or nonzero magnetization, there are nonzero spin Drude weights and thus ballistic quantum spin transport can be achieved along the reconstructed edges, These could be used for quantum spin information transfer and spintronic applications.
