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arXiv 1604.01239cond-mat.mes-hallcond-mat.mtrl-sci
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电流控制Skyrmionic二极管

Current-Controlled Skyrmionic Diode

Xiangjun Xing, Philip W. T. Pong, Yan Zhou

摘要:

为了解决传统的基于电荷的技术目前所遇到的许多挑战和瓶颈,正在积极探索各种替代方案,以在超过摩尔时代提供设备小型化和缩放的潜在解决方案。在这些替代方案中,自旋电子学物理和器件最近通过利用电子自旋的附加程度而吸引了迅速增长的兴趣。例如,已经通过操纵畴壁运动实现了磁畴壁赛道存储器和逻辑器件。与基于畴壁的器件相比,磁skyrmions具有超小尺寸(通常直径为5-100 nm)、容易的电流驱动运动、拓扑稳定性和独特的涌现电动力学等优点,有望在下一代电子学中应用于超过摩尔的领域。在这项工作中,磁meron二极管,这表现得像一个PN结二极管,是第一次证明,通过剪裁电流控制的单向运动的边缘meron(即,分数skyrmions)在纳米轨道与界面Dzyaloshinskiii-Moriya相互作用。的梅龙二极管的工作原理,理论上预期从蒂勒方程的拓扑磁性物体,进一步验证了微磁模拟。目前的研究揭示了磁性物体的拓扑无关的输运性质,并有望打开前景的集成复合电路,统一的数据存储和处理,基于一个单一的磁性芯片,作为一个构建块,可以使用meron二极管,开发复杂的逻辑组件,或作为一个信号控制器,互连skyrmion,畴壁,甚至自旋波器件。

英文摘要:

In order to address many of the challenges and bottlenecks currently experienced by traditional charge based technologies, various alternatives are being actively explored to provide potential solutions of device miniaturization and scaling in the more-than-MOORE era. Amongst these alternatives, spintronics physics and devices have recently attracted a rapidly increasing interest by exploiting the additional degree of electron's spins. For example, magnetic domain-wall racetrack-memory and logic devices have been realized via manipulating domain-wall motion. As compared to domain-wall based devices, magnetic skyrmions have the advantages of ultra-small size (typically 5-100 nm in diameter), facile current-driven motion, topological stability and peculiar emergent electrodynamics, promising for next-generation electronics applications in the more-than-Moore regime. In this work, a magnetic meron diode, which behaves like a PN-junction diode, is demonstrated for the first time, by tailoring the current-controlled unidirectional motion of edge-merons (i.e., fractional skyrmions) in a nanotrack with interfacial Dzyaloshinskii-Moriya interaction. The working principles of the meron diode, theoretically expected from the Thiele equation for topological magnetic objects, are further verified by micromagnetic simulations. The present study reveals topology-independent transport property of magnetic objects, and is expected to open the vista toward integrated composite circuitry, with unified data storage and processing, based on a single magnetic chip, as the meron diode can be used either, as a building block, to develop complex logic components or, as a signal controller, to interconnect skyrmion, domain-wall, and even spin-wave devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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