在Nb{110) 上的稀土原子作为设计拓超导的平台
David Antognini Silva1,2, Yu Wang3, Nicolae Atodiresei1
1Peter Grünberg Institut, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany.
Nano letters
|January 29, 2026
概括
在表面上的加多基原子会产生磁性旋转纹理. 这些纹理是开发拓超导和Majorana零模式而不需要自旋轨道合的关键.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 量子计算是一种量子计算.
背景情况:
- 拓超导和Majorana零模式对于容错量子计算至关重要.
- 达到这些状态通常需要内在的旋转轨道合,限制材料选择.
- 超导体上的一维磁链提供了一个替代路线.
研究的目的:
- 研究加多 (Gd) 原子在Nb(110) 表面上的磁性相互作用.
- 在单个Gd原子和二元体中分析Yu-Shiba-Rusinov状态的形成.
- 预测潜在的拓超导的自旋纹理和基态.
主要方法:
- 扫描道显微镜和光谱 (STM/STS) 用于原子尺度分析.
- 密度函数理论 (DFT) 用于理解电子和磁性质.
- 旋转动力学模拟用于预测磁性配置.
主要成果:
- 在Nb(110) 上的Gd体表现出很大的磁矩,并建立间接交换相互作用.
- 由于这些相互作用,在单个原子和二元体中可观察到的Yu-Shiba-Rusinov状态出现.
- 在Gd链中预测了稳定的奇拉 Néel 类型的旋转螺旋配置.
结论:
- 像Gd这样的稀土磁铁提供了一个可调节的平台,用于创建旋转螺旋的地面状态.
- 这项工作证明了通往拓超导的途径,独立于内在自旋轨道合.
- 这一发现为新型超导材料提供Majorana模式铺平了道路.
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