Intrinsic magnetism in superconducting infinite-layer nickelates
Intrinsic magnetism in superconducting infinite-layer nickelates
复制标题
DOI：
10.1038/s41567-022-01684-y
复制
发表时间：
2022-08-01
期刊：
影响因子：
19.6
通讯作者：
Suter, Andreas
中科院分区：
文献类型：
--
作者：
Fowlie, Jennifer;Hadjimichael, Marios;Suter, Andreas
Nd0.8Ar0.2NiO2超导电性的发现(1))提出了一种新的层状镍酸盐超导体家族，该家族现已扩展到包括一系列锶掺杂(2，3)、用Pr或La替代Nd3(4-7)，以及五层化合物Nd6Ni5O12(参考文献[1])。(8))。许多研究表明，这些材料(9-15)中的电子相关性很强，这一特征往往会导致磁性的出现。在这里，我们报道了一系列超导无限层镍酸盐的Muon自旋旋转/弛豫研究。无论是稀土离子还是掺杂，我们都观察到了由镍亚晶格上的局部力矩引起的本征磁性基态。磁性-可能是反铁磁性和短程有序的-与超导共存让人想起一些铁化合物(16)和重费米子化合物(17)，并且在性质上与掺杂的铜酸盐(18)不同。
The discovery of superconductivity in Nd0.8Ar0.2NiO2 (ref. (1)) introduced a new family of layered nickelate superconductors that has now been extended to include a range of strontium doping(2,3), praseodymium or lanthanum in place of neodymium(4-7), and the five-layer compound Nd6Ni5O12 (ref. (8)). A number of studies have indicated that electron correlations are strong in these materials(9-15), a feature that often leads to the emergence of magnetism. Here we report muon spin rotation/relaxation studies of a series of superconducting infinite-layer nickelates. Regardless of the rare earth ion or doping, we observe an intrinsic magnetic ground state arising from local moments on the nickel sublattice. The coexistence of magnetism-which is likely to be antiferromagnetic and short-range ordered-with superconductivity is reminiscent of some iron pnictides(16) and heavy fermion compounds(17), and qualitatively distinct from the doped cuprates(18).