论文标题
观察可调的单原子Yu-Shiba-Rusinov表明
Observation of tunable single-atom Yu-Shiba-Rusinov states
论文作者
论文摘要
旋转与潜在底物的耦合是众多现象的基础。在金属底物的情况下，可能会对ADATOM磁矩进行临界筛选。随着底物的变化超导，出现了一个有趣的情况，由于Adatom旋转导致Yu-Shiba-Rusinov绑定的状态，但也与Kondo现象交织在一起。通过扫描隧道光谱法，我们分析了近代筛查和超导性的相互依赖性。我们在NB上获得的单个Fe Atatoms获得的数据（110）表明，耦合和所得的YSR态非常依赖于位点依赖性，并揭示了与超导间隙相当的近藤温度下的量子相变。通过密度功能理论和连续时间量子蒙特卡洛计算，实验签名是合理化的，以严格处理磁性和杂交对相等基础的影响。
The coupling of a spin to an underlying substrate is the basis for a plethora of phenomena. In the case of a metallic substrate, Kondo screening of the adatom magnetic moment can occur. As the substrate turns superconducting, an intriguing situation emerges where the pair breaking due to the adatom spins leads to Yu-Shiba-Rusinov bound states, but also intertwines with Kondo phenomena. Through scanning tunneling spectroscopy, we analyze the interdependence of Kondo screening and superconductivity. Our data obtained on single Fe adatoms on Nb(110) show that the coupling and the resulting YSR states are strongly adsorption site-dependent and reveal a quantum phase transition at a Kondo temperature comparable to the superconducting gap. The experimental signatures are rationalized by combined density functional theory and continuous-time quantum Monte-Carlo calculations to rigorously treat magnetic and hybridization effects on equal footing.
