Long range and highly tunable interaction between local spins coupled to a superconducting condensate.
Long range and highly tunable interaction between local spins coupled to a superconducting condensate.
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DOI：
10.1038/s41467-021-26802-x
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发表时间：
2021-11-18
影响因子：
16.6
通讯作者：
Sessi P
中科院分区：
文献类型：
--
作者：
Küster F;Brinker S;Lounis S;Parkin SSP;Sessi P
磁性与超导凝聚体的界面连接正迅速成为创新量子技术发展的可行途径。在这种情况下，开发合理的设计策略来控制磁矩之间的相互作用是至关重要的。在这里，我们解决了这个问题，展示了以原子尺度精度调整通过超导冷凝物耦合的局部自旋之间相互作用的可能性。通过将Cr原子耦合到超导Nb上，我们利用原子操纵技术精确地控制了沿不同晶体学方向的局部自旋之间的相对距离，同时通过扫描隧道光谱检测它们的耦合。我们的结果揭示了高度各向异性相互作用的存在，持续了很长的距离，证明了通过作用于自旋之间的方向和原子间距离来跨越量子相变的可能性。这种高可调性为拓扑超导的实现和磁超导界面的合理设计提供了新的机会。利用超导性来控制磁矩之间的间接相互作用的可能性在很大程度上仍未被探索。在这里，作者报告了通过Nb中的超导冷凝物耦合Cr原子的局部自旋之间的相互作用。
Interfacing magnetism with superconducting condensates is rapidly emerging as a viable route for the development of innovative quantum technologies. In this context, the development of rational design strategies to controllably tune the interaction between magnetic moments is crucial. Here we address this problem demonstrating the possibility of tuning the interaction between local spins coupled through a superconducting condensate with atomic scale precision. By using Cr atoms coupled to superconducting Nb, we use atomic manipulation techniques to precisely control the relative distance between local spins along distinct crystallographic directions while simultaneously sensing their coupling by scanning tunneling spectroscopy. Our results reveal the existence of highly anisotropic interactions, lasting up to very long distances, demonstrating the possibility of crossing a quantum phase transition by acting on the direction and interatomic distance between spins. The high tunability provides novel opportunities for the realization of topological superconductivity and the rational design of magneto-superconducting interfaces. The possibility of using superconductivity to control indirect interactions between magnetic moments remains largely unexplored. Here, the authors report tuning the interaction between local spins of Cr atoms coupled through a superconducting condensate in Nb.
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影响因子：
19.6
作者：
Menard, Gerbold C.;Guissart, Sebastien;Cren, Tristan
通讯作者：
Cren, Tristan
影响因子：
10.8
作者：
Kezilebieke S;Dvorak M;Ojanen T;Liljeroth P
通讯作者：
Liljeroth P
影响因子：
8.6
作者：
Choi, Deung-Jang;Garcia Fernandez, Carlos;Lorente, Nicolas
通讯作者：
Lorente, Nicolas
影响因子：
5.5
作者：
Huang, Haonan;Drost, Robert;Ast, Christian R.
通讯作者：
Ast, Christian R.
影响因子：
--
作者：
KASUYA, T
通讯作者：
KASUYA, T