利用双功能化探针针尖提升扫描隧道显微镜（STM）的空间与能量分辨率
Boosting the STM's spatial and energy resolution with double-functionalized probe tips
AI总结：
针对YSR束缚态共振波长短、传统STM难以分辨的问题，研究人员结合CO分子与超导团簇制备双功能化STM针尖，实现了更高的空间和能量分辨率，成功观测到Nb(110)表面Fe原子周围杂化YSR态的干涉图案，拓展了STM在原子尺度超导研究中的能力。
摘要：
超导表面的磁性杂质对超导电子对的散射会产生成对的尖锐隙内共振，即Yu-Shiba-Rusinov（YSR，于-柴-鲁西诺夫）束缚态。与正常金属中缺陷散射巡游电子产生的干涉类似，这些共振在磁性杂质周围呈现出周期性纹理。然而，即便借助扫描隧道显微镜（STM）这类具备原子级分辨率的方法，这些共振的波长通常也过短，难以被分辨。本研究将CO分子与预先附着在STM针尖上的超导团簇相结合，以同时最大化空间分辨率和能量分辨率。研究人员通过对Nb(110)表面磁性Fe原子周围YSR态的空间分布成像，证实了这类双功能化探针的优异性能。该方法揭示了杂化YSR态丰富的干涉图案，这是此前传统STM探针无法观测到的。这一进展拓展了STM技术的能力，为原子尺度下的超导现象研究提供了新见解。
英文摘要：
Scattering of superconducting pairs by magnetic impurities on a superconducting surface leads to pairs of sharp in-gap resonances, known as Yu-Shiba-Rusinov (YSR) bound states. Similarly to the interference of itinerant electrons scattered by defects in normal metals, these resonances reveal a periodic texture around the magnetic impurity. However, the wavelength of these resonances is often too short to be resolved even by methods capable of atomic resolution, like scanning tunneling microscopy (STM). Here, we combine a CO molecule with a superconducting cluster pre-attached to an STM tip to maximize both spatial and energy resolution. The superior properties of such a double-functionalized probe are demonstrated by imaging the spatial distribution of YSR states around magnetic Fe atoms on a Nb(110) surface. Our approach reveals rich interference patterns of the hybridized YSR state, previously inaccessible with conventional STM probes. This advancement extends the capabilities of STM techniques, providing insights into superconducting phenomena at the atomic scale.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
