论文标题
通过超导体上的磁分子干扰隧道路径：近代和Yu-Shiba-Rusinov共振的不对称性
Interfering tunneling paths through magnetic molecules on superconductors: Asymmetries of Kondo and Yu-Shiba-Rusinov resonances
论文作者
论文摘要
超导体上的磁吸附物在超导能量差距内部诱导外部的近托共振，Yu-Shiba-Rusinov（YSR）结合的状态。当通过扫描隧道光谱探测时，相关的差分传导光谱经常表现出特征性的偏置不对称性。在这里，我们观察到跨Pb上吸附的Fe-孢子蛋白分子的近多和YSR不对称的变化（111）。我们表明，这两种不对称性均源于通过旋转轨道和最高占用的分子轨道（HOMO）干扰隧道路径。该模型的有力证据来自同性恋的节点平面，在该平面上，隧道揭示了对称的近代和YSR共振。我们的结果建立了临近和YSR线路不对称的重要机制。
Magnetic adsorbates on superconductors induce a Kondo resonance outside and Yu-Shiba-Rusinov (YSR) bound states inside the superconducting energy gap. When probed by scanning tunneling spectroscopy, the associated differential-conductance spectra frequently exhibit characteristic bias-voltage asymmetries. Here, we observe correlated variations of Kondo and YSR asymmetries across an Fe-porphyrin molecule adsorbed on Pb(111). We show that both asymmetries originate in interfering tunneling paths via a spin-carrying orbital and the highest occupied molecular orbital (HOMO). Strong evidence for this model comes from nodal planes of the HOMO, where tunneling reveals symmetric Kondo and YSR resonances. Our results establish an important mechanism for the asymmetries of Kondo and YSR lineshapes.
