重構自旋紋理的納米級的自旋波電路

論文標題：Nanoscale spin-wave circuits based on engineered reconfigurable spin-textures

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

數字識別碼： 10.1038/s42005-018-0056-x

作為一種新興的信息處理技術，磁振子學倍受關注。自旋波的波動特徵和焦耳無熱傳播，有望用於開發基於磁振子集成電路的高效計算平台。由於傳統方法難以定製納米級的磁性，導致納米級電路的實現極具挑戰，但實現納米級電路仍是至關重要的。

近日，來自美國紐約城市大學的EdoardoAlbisetti和義大利米蘭理工大學的Daniela Petti在《通訊-物理學》上發表了一篇文章Nanoscale spin-wave circuits based on engineered reconfigurable spin-textures。他們帶領的研究團隊利用圖案化的自旋紋理在實驗上實現了納米級可重構的自旋波電路。通過空間和時間分辨掃描透射X射線顯微鏡成像技術，他們直觀地呈現了任意形狀的納米磁振子波導中自旋波傳播的通道和方向，並且不需要外部磁場或電流。此外，他們還展示了一種基於兩個收斂納米波導的原型電路，以實現可調的受限自旋波模式的空間疊加和干涉。這項工作為使用設計化的自旋紋理搭建基於自旋波的計算器件奠定了基礎。

圖1：納米尺度自旋紋理的圖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.

閱讀論文全文請訪問：http://t.cn/EUBBcdN

期刊介紹：Communications Physics(https://www.nature.com/commsphys/) 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.

（來源：Communications Physics）

喜歡這篇文章嗎？立刻分享出去讓更多人知道吧！