Yu–Shiba–Rusinov states induced by single Fe atoms on reconstructed compound superconductor V3Si

IF 2.1 4区化学 Q3 CHEMISTRY, PHYSICAL Surface Science Pub Date : 2024-05-04 DOI:10.1016/j.susc.2024.122504

Bastian Noßmann , Zuodong Yu , Ankur Das , Stefan Schulte , Nicolas Néel , Chien-Te Wu , Stefan Kirchner , Jörg Kröger

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Abstract

Reconstructed surfaces of the A15-compound superconductor V $_{3}$ Si(100) that are possibly induced by the segregation of bulk impurities serve as platforms to study the dependence of Yu–Shiba–Rusinov states induced by a single Fe atom on the adsorption site. Their number, energy and electron–hole asymmetry vary strongly with the atomic environment of the Fe atom. These variations are indicative of different Fe $d$ -orbitals being active in the site-dependent exchange coupling with the substrate Cooper pairs. Spatially resolved spectroscopy gives rise to a short decay length of the Yu–Shiba–Rusinov states and thereby suggests the three-dimensional character of the scattering process underlying the bound states.

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单个铁原子在重构复合超导体 V3Si 上诱导的 Yu-Shiba-Rusinov 态

A15 复合超导体 V3Si(100)的重构表面可能是由块状杂质的偏析诱发的，它是研究由单个铁原子诱发的 Yu-Shiba-Rusinov 状态对吸附位点的依赖性的平台。它们的数量、能量和电子-空穴不对称性随着铁原子的原子环境而强烈变化。这些变化表明，在与基底库珀对的交换耦合中，不同的铁 d 轨道处于活跃状态。空间分辨光谱法显示 Yu-Shiba-Rusinov 状态的衰变长度很短，这表明束缚态的散射过程具有三维特征。

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来源期刊

Surface Science 化学-物理：凝聚态物理

CiteScore

3.30

自引率

5.30%

发文量

137

审稿时长

25 days

期刊介绍： Surface Science is devoted to elucidating the fundamental aspects of chemistry and physics occurring at a wide range of surfaces and interfaces and to disseminating this knowledge fast. The journal welcomes a broad spectrum of topics, including but not limited to: • model systems (e.g. in Ultra High Vacuum) under well-controlled reactive conditions • nanoscale science and engineering, including manipulation of matter at the atomic/molecular scale and assembly phenomena • reactivity of surfaces as related to various applied areas including heterogeneous catalysis, chemistry at electrified interfaces, and semiconductors functionalization • phenomena at interfaces relevant to energy storage and conversion, and fuels production and utilization • surface reactivity for environmental protection and pollution remediation • interactions at surfaces of soft matter, including polymers and biomaterials. Both experimental and theoretical work, including modeling, is within the scope of the journal. Work published in Surface Science reaches a wide readership, from chemistry and physics to biology and materials science and engineering, providing an excellent forum for cross-fertilization of ideas and broad dissemination of scientific discoveries.