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.

该超导自旋电子学实验项目将研究铁磁超导约瑟夫森结中的自旋扭矩。在 4.2K 温度下运行的超导计算机已被提议用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，以及毫开尔文温度下的量子计算机操作员与传统室温电子设备之间的接口。虽然在这种 4.2K 计算机中实现逻辑的技术已经很成熟，但仍然没有合适的技术来实现寄存器之外的低温存储器。该项目旨在通过开发物理和材料来实现基于铁磁约瑟夫森结的存储技术来满足这一需求。基于铁磁约瑟夫森结的存储器将传统磁阻 RAM 单元的磁存储能力与超导体的无耗散特性相结合。与第一代 MRAM 设计一样，我们最初的铁磁约瑟夫森结设计依赖于外加磁场来设置结 1-3 的状态。在现代 MRAM 单元中，状态是通过利用自旋转移扭矩或自旋轨道扭矩以电气方式改变磁性状态来设置的。迄今为止，超导结还没有采取同等的措施。