论文标题：Nanoscale spin-wave circuits based on engineered reconfigurable spin-textures

期刊：

作者：Edoardo Albisetti, Daniela Petti, Giacomo Sala, Raffaele Silvani, Silvia Tacchi, Simone Finizio, Sebastian Wintz, Annalisa Calò, Xiaorui Zheng, Jörg Raabe, Elisa Riedo, Riccardo Bertacco

发表时间：2018/09/20

数字识别码： 10.1038/s42005-018-0056-x

原文链接：

作为一种新兴的信息处理技术，磁振子学倍受关注。自旋波的波动特征和焦耳无热传播，有望用于开发基于磁振子集成电路的高效计算平台。由于传统方法难以定制纳米级的磁性，导致纳米级电路的实现极具挑战，但实现纳米级电路仍是至关重要的。

近日，来自美国纽约城市大学的EdoardoAlbisetti和意大利米兰理工大学的Daniela Petti在《通讯-物理学》上发表了一篇文章Nanoscale spin-wave circuits based on engineered reconfigurable spin-textures。他们带领的研究团队利用图案化的自旋纹理在实验上实现了纳米级可重构的自旋波电路。通过空间和时间分辨扫描透射X射线显微镜成像技术，他们直观地呈现了任意形状的纳米磁振子波导中自旋波传播的通道和方向，并且不需要外部磁场或电流。此外，他们还展示了一种基于两个收敛纳米波导的原型电路，以实现可调的受限自旋波模式的空间叠加和干涉。这项工作为使用设计化的自旋纹理搭建基于自旋波的计算器件奠定了基础。

图1：纳米尺度自旋纹理的图案化和受限自旋波模式的研究

摘要：Magnonicsis gaining momentum as an emerging technology for information processing. The wave character and Joule heating-free propagation of spin-waves hold promises for highly efficient computing platforms, based on integrated magnonic circuits. The realization of such nanoscale circuitry is crucial, although extremely challenging due to the difficulty of tailoring the nanoscopic magnetic properties with conventional approaches. Here we experimentally realize a nanoscale reconfigurable spin-wave circuitry by using patterned spin-textures. By space and time-resolved scanning transmission X-ray microscopy imaging, we directly visualize the channeling and steering of propagating spin-waves in arbitrarily shaped nanomagnonic waveguides, with no need for external magnetic fields or currents. Furthermore, we demonstrate a prototypic circuit based on two converging nanowaveguides, allowing for the tunable spatial superposition and interference of confined spin-waves modes. This work paves the way to the use of engineered spin-textures as building blocks of spin-wave based computing devices.

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期刊介绍：() is an open access journal from Nature Research publishing high-quality research, reviews and commentary in all areas of physics. Research papers published by the journal represent significant advances bringing new insight to a specialized area of research.

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