论文标题
当超导性不惧怕磁性时：对rbeufe $ _ {4} $的电子结构的洞察力为$ _ {4} $
When superconductivity does not fear magnetism: Insight into electronic structure of RbEuFe$_{4}$As$_{4}$
论文作者
论文摘要
在新颖的化学计量铁基材料rbeufe $ _ {4} $ AS $ _ {4} $超导率共存的欧盟4F状态具有特殊的长距离磁性顺序。使用角度分辨光发射光谱，我们揭示了一个复杂的三维电子结构，并将其与密度功能理论计算进行比较。在费米表面的各个床单上测量了多个超导间隙。高分辨率谐振光发射光谱揭示了欧盟4F状态深入超导阶段的磁性。超导间隙的绝对值和各向异性都与没有欧盟的兄弟姐妹化合物非常相似，这表明欧盟磁性不会影响电子的配对。 Fe-和EU衍生状态之间的完全解耦是通过温度的演化确定的，因此明确地证明了超导和远距离磁性依从彼此独立存在。 $ _ {4} $的已建立的电子结构为$ _ {4} $为在这个具有兴奋剂的铁基超导体中的高度非传统的电子配对和相位竞争的未来研究开放。
In the novel stoichiometric iron-based material RbEuFe$_{4}$As$_{4}$ superconductivity coexists with a peculiar long-range magnetic order of Eu 4f states. Using angle-resolved photoemission spectroscopy, we reveal a complex three dimensional electronic structure and compare it with density functional theory calculations. Multiple superconducting gaps were measured on various sheets of the Fermi surface. High resolution resonant photoemission spectroscopy reveals magnetic order of the Eu 4f states deep into the superconducting phase. Both the absolute values and the anisotropy of the superconducting gaps are remarkably similar to the sibling compound without Eu, indicating that Eu magnetism does not affect the pairing of electrons. A complete decoupling between Fe- and Eu-derived states was established from their evolution with temperature, thus unambiguously demonstrating that superconducting and a long range magnetic orders exist independently from each other. The established electronic structure of RbEuFe$_{4}$As$_{4}$ opens opportunities for the future studies of the highly unorthodox electron pairing and phase competition in this family of iron-based superconductors with doping.
