论文标题
闸门控制的天空和域墙手性
Gate-controlled skyrmion and domain wall chirality
论文作者
论文摘要
磁性天空是局部的手性自旋纹理，在纳米级可存储和处理信息提供了巨大的希望。在存在不对称交换相互作用的情况下，控制其动力学的手性通常被视为样品沉积过程中的内在参数集。在这项工作中，我们在实验上证明了栅极电压可以控制此关键参数。我们通过观察其电流诱导的运动的方向来探测天空和手性结构域壁的手性，并表明栅极电压可以逆转它。手性的局部和动态逆转是由于我们归因于栅极电压下氧气迁移的界面dzyaloshinskii-moriya相互作用的符号反转。微磁模拟表明，手性逆转是一种连续的转换，在这种转化中，天空是保守的。用2-3 V门电压对手性的控制可用于基于天空的逻辑设备，从而产生新的功能。
Magnetic skyrmions are localized chiral spin textures, which offer great promise to store and process information at the nanoscale. In the presence of asymmetric exchange interactions, their chirality, which governs their dynamics, is generally considered as an intrinsic parameter set during the sample deposition. In this work, we experimentally demonstrate that a gate voltage can control this key parameter. We probe the chirality of skyrmions and chiral domain walls by observing the direction of their current-induced motion and show that a gate voltage can reverse it. This local and dynamical reversal of the chirality is due to a sign inversion of the interfacial Dzyaloshinskii-Moriya interaction that we attribute to ionic migration of oxygen under gate voltage. Micromagnetic simulations show that the chirality reversal is a continuous transformation, in which the skyrmion is conserved. This control of chirality with 2 - 3 V gate voltage can be used for skyrmion-based logic devices, yielding new functionalities.
