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耗方面取得显着改进，因为在传输位时不存在欧姆损耗。然而，由于缺乏可以耦合到超导逻辑的合适低温存储器，这些优点中的大多数都被抵消了。超导自旋电子学的目标是通过集成磁性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，从而实现了基于自旋、电荷和超导相位相干性之间相互作用的新设备概念。这包括在巨磁阻阀的超导等效物中演示超低能量磁读出。 PICaSSO 的愿景是利用两种不同的效应：超导体引起的磁各向异性和超电流引起的自旋积累，通过直接源自超导关联的扭矩来实现磁体的皮秒切换。为了实现这一愿景，PICaSSO 采用时间分辨方法，以与基本相互作用时间相当的时间分辨率拍摄不同混合磁超导结构中自旋和超导之间的相互作用。这将使磁体和超导体以尽可能快的时间尺度耦合，并将允许首次研究 s 波超导体中的瞬态三重态相关性。 PICaSSO 进行的研究将为超快超导自旋电子学奠定基础，并为超导存储器和逻辑器件的全面集成铺平道路。