论文标题
通过调整费米能量的电子密度来研究Yu-Shiba-Rusinov结合状态
Study of Yu-Shiba-Rusinov bound states by tuning the electron density at the Fermi energy
论文作者
论文摘要
磁原子可以打破超导体的库珀对，从而导致超导间隙内部结合状态的Yu-Shiba-Rusinov（YSR）结合。理论预测，YSR结合状态可以通过在费米能量的电子密度调整电子密度来控制，但尚未深入研究。在这项工作中，我们通过调谐费米能量的电子密度来研究YSR结合状态的性质。通过比较两个系统，即Pb/pb（111）上的Mn-苯苯胺分子（111）和CO原子（111），我们证明了U的符号可以通过在FERMI能量上改变电子密度来明确确定。我们还表明，您在形成YSR绑定状态的情况下与交换互动JS竞争。我们的工作提供了对基本水平上磁原子与超导体之间相互作用的见解。
Magnetic atoms can break the Cooper pairs of superconductors, leading to the formation of Yu-Shiba-Rusinov (YSR) bound states inside superconducting gaps. Theory predicts that the YSR bound states can be controlled by tuning the electron density at the Fermi energy, but it has not been studied deeply. In this work, we studied the nature of YSR bound states in response to the potential scattering U by tuning the electron density at the Fermi energy. By comparing two systems, Mn-phthalocyanine molecules on Pb(111) and Co atoms on PbSe/Pb(111), we demonstrate that the sign of U can be unambiguously determined by varying the electron density at the Fermi energy. We also show that U competes with the exchange interaction JS in the formation of YSR bound states. Our work provides insights into the interactions between magnetic atoms and superconductors at a fundamental level.
