Abstract It has been shown recently that the magnetic state of single-atom vacancy in graphene can be manipulated reversibly by mechanical deformation. Here, we investigate the possibility to flip the spin current of a model graphene device using nanomechanical distortion. Extensive first-principles calculations show that spin polarized currents can be altered by applying a shear distortion. The magnetic transitions in the central device, which is associated with the reversal of spin polarization of the π band of the vacancy state, lead to current flip with a spin filtering efficiency up to 17% (and a maximum change by 24% upon distortion). Our result opens the possibility to control spin transport properties in graphene and has potential applications in spintronics such as spin valves and spin transistors.

中文翻译：

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使用单空位石墨烯的自旋电流翻转的纳米机械控制

摘要 最近研究表明，石墨烯中单原子空位的磁态可以通过机械变形可逆地控制。在这里，我们研究了使用纳米机械畸变翻转模型石墨烯器件的自旋电流的可能性。广泛的第一性原理计算表明，可以通过应用剪切畸变来改变自旋极化电流。中心器件中的磁跃迁与空位 π 带的自旋极化反转有关，导致电流翻转，自旋过滤效率高达 17%（畸变时最大变化为 24%） . 我们的结果开辟了控制石墨烯中自旋输运特性的可能性，并在自旋电子学中具有潜在的应用，如自旋阀和自旋晶体管。