Unconventional superconductivity and magnetism are intertwined on a microscopic level in a wide class of materials, including high-T _c cuprates, iron pnictides, and heavy-fermion compounds. Interactions between superconducting electrons and bosonic fluctuations at the interface between adjacent layers in heterostructures provide a new approach to this most fundamental and hotly debated subject. We have been able to use a recent state-of-the-art molecular-beam-epitaxy technique to fabricate superlattices consisting of different heavy-fermion compounds with atomic thickness. These Kondo superlattices provide a unique opportunity to study the mutual interaction between unconventional superconductivity and magnetic order through the atomic interface. Here, we design and fabricate hybrid Kondo superlattices consisting of alternating layers of superconducting CeCoIn₅ with d-wave pairing symmetry and nonmagnetic metal YbCoIn₅ or antiferromagnetic heavy fermion metals such as CeRhIn₅ and CeIn₃. In these Kondo superlattices, superconducting heavy electrons are confined within the two-dimensional CeCoIn₅ block layers and interact with neighboring nonmagnetic or magnetic layers through the interface. Superconductivity is strongly influenced by local inversion symmetry breaking at the interface in CeCoIn₅/YbCoIn₅ superlattices. The superconducting and antiferromagnetic states coexist in spatially separated layers in CeCoIn₅/CeRhIn₅ and CeCoIn₅/CeIn₃ superlattices, but their mutual coupling via the interface significantly modifies the superconducting and magnetic properties. The fabrication of a wide variety of hybrid superlattices paves a new way to study the relationship between unconventional superconductivity and magnetism in strongly correlated materials.

非常规超导与磁相互交织上在很宽的一类材料在微观水平，其中高Ť _Ç铜酸盐、铁元素和重费米子化合物。超导电子与异质结构中相邻层之间界面处的玻色子涨落之间的相互作用为这一最基本和最激烈争论的主题提供了一种新方法。我们已经能够使用最近最先进的分子束外延技术来制造由具有原子厚度的不同重费米子化合物组成的超晶格。这些近藤超晶格提供了一个独特的机会来研究非常规超导性和通过原子界面的磁序之间的相互作用。在这里，我们设计并制造了混合近藤超晶格，由超导 CeCoIn ₅的交替层和d-波配对对称性和非磁性金属 YbCoIn ₅或反铁磁性重费米子金属，如 CeRhIn ₅和 CeIn ₃。在这些近藤超晶格中，超导重电子被限制在二维 CeCoIn ₅阻挡层内，并通过界面与相邻的非磁性或磁性层相互作用。超导性受到 CeCoIn ₅ /YbCoIn ₅超晶格界面处局部反转对称性破坏的强烈影响。CeCoIn ₅ /CeRhIn ₅和CeCoIn ₅ /CeIn _{3 的}空间分离层中超导和反铁磁状态共存超晶格，但它们通过界面的相互耦合显着改变了超导和磁性。各种混合超晶格的制造为研究强相关材料中非常规超导性与磁性之间的关系铺平了道路。