交换-旋转-分裂约瑟夫森超电流二极管中非挥发性异常相位变化的干涉测证证据
Kun-Rok Jeon1, Jae-Keun Kim2, Jiho Yoon2
1Department of Physics, Chung-Ang University (CAU), 06974 Seoul, Republic of Korea.
ACS nano
|January 22, 2026
概括
超导约瑟夫森连接 (JJs) 显示可调节的零场二极管行为. 这是通过工程界面磁顺序和Rashba旋转轨道相互作用来实现的,用于冷应用.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子信息科学 量子信息科学
- 材料科学 材料科学 材料科学
背景情况:
- 约瑟夫森连接点 (JJs) 的超电流纠正对于超导电子非常重要.
- 拉什巴型系统为新型功能提供独特的旋转轨道合特性.
- 工程异构结构中的近距离效应可以改变电子和磁性质.
研究的目的:
- 在Rashba类型的Pt Josephson连接处证明非挥发性异常相位移 (φ0).
- 调查近距离效应在控制零场二极管行为中的作用.
- 为了阐明接口磁顺序和旋转轨道相互作用如何调整二极管性能.
主要方法:
- 使用Pt,Ta,W和Pd屏障制造约瑟夫森交叉点.
- 通过超导量子干涉测量探测异常相位移 (φ0).
- 屏障材料的系统变化,以修改磁性易感性和旋转轨道合.
主要成果:
- 在Pt JJs中,有自发的时间逆转对称性破坏的直接相位敏感证据.
- 与Pt JJ相比,Ta (W) JJs具有约17% (~5%) 的零场二极管效率,极性相反.
- Pd JJs显示~15%的零场二极管效率,表明可通过近距离工程调节的性能.
结论:
- 非挥发性异常相位移 (φ0) 在Rashba类型系统中直接被证明.
- 零场二极管的性能可以通过工程界面磁顺序和Rashba旋转轨道相互作用来调整.
- 这些发现为先进的超导逻辑电路和冷记忆器铺平了道路.
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