元素超导体上原子制造自旋链中的自旋耦合工程
Engineering the spin couplings in atomically crafted spin chains on an elemental superconductor
摘要：
超导体上的磁性原子在超导能隙内产生Yu-Shiba-Rusinov（YSR）态。s波超导体上磁性吸附原子的自旋链可能导致拓扑超导性，并伴随着链端出现Majorana模。对于它们在量子计算中的应用，人工组装链并控制链中和衬底中自旋之间的交换耦合是先决条件。在这里，使用扫描隧道显微镜的提示，我们展示了工程的能级的YSR状态，通过将间隙Fe原子在靠近吸附的Fe原子氧化钽表面。基于这个原型平台，我们表明，一个长链内的相互作用可以通过连接吸附的Fe原子与间隙的。我们的工作增加了一个重要的一步，控制设计和操纵马约拉纳最终状态。
英文摘要：
Magnetic atoms on a superconductor give rise to Yu-Shiba-Rusinov (YSR) states within the superconducting energy gap. A spin chain of magnetic adatoms on an s-wave superconductor may lead to topological superconductivity accompanied by the emergence of Majorana modes at the chain ends. For their usage in quantum computation, it is a prerequisite to artificially assemble the chains and control the exchange couplings between the spins in the chain and in the substrate. Here, using a scanning tunneling microscope tip, we demonstrate engineering of the energy levels of the YSR states by placing interstitial Fe atoms in close proximity to adsorbed Fe atoms on an oxidized Ta surface. Based on this prototype platform, we show that the interaction within a long chain can be strengthened by linking the adsorbed Fe atoms with the interstitial ones. Our work adds an important step towards the controlled design and manipulation of Majorana end states.
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。
