Picosecond superconductivity-driven spin-torques

皮秒超导驱动的自旋扭矩

• 批准号: EP/Z000637/1
• 负责人: Chiara Ciccarelli
• 金额: $ 233.22万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FZ000637%2F1
• 关键词: Picosecond; superconductivity; driven; spin; torques

Superconducting logic holds the promise of significant improvement compared to traditional semiconductor logic, both in terms of computational power and energy consumption, due to the lack of ohmic losses when transferring bits. However, most of these advantages are negated by the lack of a suitable cryogenic memory that can be coupled to the superconducting logic. The ambition of superconducting spintronics is to develop a superconducting memory by integrating magnetic and superconducting elements. Recent discoveries have shown new routes for superconductivity and magnetism to co-operate, enabling new device concepts based on the interplay between spin, charge and superconducting phase coherence. This includes the demonstration of ultra-low energy magnetic read-out in the superconducting equivalent of a giant-magneto-resistance valve. The vision of PICaSSO is to achieve the picosecond switching of a magnet via torques directly originating in the superconducting correlation by exploiting two different effects: superconductor-induced magnetic anisotropy and supercurrent-induced spin accumulation. To realise this vision PICaSSO adopts time-resolved methods that will photograph the interplay between spins and superconductivity in different hybrid magnetic-superconducting structures with a time resolution comparable with their fundamental interaction time. This will enable coupling magnets and superconductors at the fastest possible timescale and will allow the first study of transient triplet correlation in s-wave superconductors. The research carried in PICaSSO will lay the foundation for ultrafast superconducting spintronics and will pave the way towards the full integration of superconducting memory and logic devices.

与传统半导体逻辑相比，超导逻辑有望在计算能力和能源消耗方面有显著改进，这是因为在传输比特时没有欧姆损耗。然而，由于缺乏可以耦合到超导逻辑的合适的低温存储器，这些优点中的大多数都被否定了。超导自旋电子学的目标是通过集成磁元件和超导元件来开发超导存储器。最近的发现显示了超导和磁性合作的新途径，使基于自旋、电荷和超导相干性之间相互作用的新器件概念成为可能。这包括在相当于巨磁阻阀的超导中演示超低能量磁读出。毕加索的愿景是通过利用两种不同的效应：超导体诱导的磁各向异性和超导诱导的自旋积累，通过直接源于超导关联的扭矩来实现磁体的皮秒开关。为了实现这一愿景，毕加索采用了时间分辨方法，将拍摄不同混合磁超导结构中自旋和超导之间的相互作用，时间分辨率可与它们的基本相互作用时间相媲美。这将使磁体和超导体在尽可能快的时间尺度上耦合，并将使首次研究S波超导体中的瞬时三重态关联。在毕加索进行的这项研究将为超快超导自旋电子学奠定基础，并将为超导存储器和逻辑器件的完全集成铺平道路。