Electrically Switchable Ferromagnetic Josephson Junctions

电可切换铁磁约瑟夫森结

• 批准号: 2828359
• 金额: --
• 依托单位: University of Leeds
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2828359
• 关键词: Electrically; Switchable; Ferromagnetic; Josephson; Junctions

This experimental project in superconducting spintronics will study spin-torques in ferromagnetic superconducting Josephson Junctions. Superconducting computers operating at 4.2K have been proposed to solve the problems of energy usage by large-scale computing, as components for a neuromorphic computer and to interface between a quantum computer operator at millikelvin temperatures and conventional room temperature electronics. Whilst the technology to implement logic in such a 4.2K computer is well established, there remains, a yet, no suitable technology to implement cryogenic memory beyond registers. This project aims to address this need by developing the physics and materials to implement memory technologies based on ferromagnetic Josephson junctions. A ferromagnetic Josephson junction based memory combines the magnetic storage capabilities of a conventional magneto-resistive RAM cell with the dissipation- less nature of superconductors. As with the first generation of MRAM designs, our initial ferromagnetic Josephson junction designs rely on an applied field to set the state of the junction 1-3. In a modern MRAM cell, the state is set by making use of spin-transfer torque or spin-orbit torques to electrical change the magnetic state. To date, there has not been the equivalent step taken with the superconducting junction counterparts.

超导旋转的这个实验项目将研究铁磁超导的约瑟夫森连接中的自旋折音。已经提出了在4.2K处运行的超导计算机来解决大规模计算的能源使用问题，作为神经形态计算机的组件，并在Millikelvin温度和常规室温电子设备下在量子计算机操作员之间接口。尽管已经确定了在这样的4.2k计算机中实施逻辑的技术，但仍有一项尚无适当的技术来实施寄存器以外的低温记忆。该项目旨在通过开发基于铁磁约瑟夫森交界的物理和材料来实施记忆技术来满足这一需求。基于Josephson的铁磁结合了常规抗磁性RAM细胞的磁性存储能力与超导体的耗散性质。与第一代MRAM设计一样，我们最初的铁磁约瑟夫森连接设计依赖于应用领域来设置连接处1-3的状态。在现代的MRAM电池中，通过利用自旋转移扭矩或自旋轨道扭矩来设置状态，以使磁态更换电气。迄今为止，超导交界处的同等步骤尚未采取同等步骤。