论文标题
无限层镍盐中淋巴结超导的证据
Evidence for nodal superconductivity in infinite-layer nickelates
论文作者
论文摘要
无限层镍含有一个新的潜在非常规超导体的家族。一个关键的开放问题是超导配对对称性。我们提出了最佳掺杂的LA_ {0.8} SR_ {0.2} Nio_ {2}，PR_ {0.8} SR_ {0.2} niO__ {2} nio_ {2}，以及Nd_ {0.8} sr_ {0.8} sr_ {0.8} sr_ {0.2} niO_________________对于LA和PRNICKELATES，超流体密度显示出二次温度依赖性，表明在存在障碍的情况下淋巴结超导性。 ND氯酸酯表现出复杂的低温行为，我们将其归因于磁杂质。这些结果与D波配对一致。
Infinite-layer nickelates present a new family of potential unconventional superconductors. A key open question is the superconducting pairing symmetry. We present low-temperature measurements of the London penetration depth in optimally doped La_{0.8}Sr_{0.2}NiO_{2}, Pr_{0.8}Sr_{0.2}NiO_{2}, and Nd_{0.8}Sr_{0.2}NiO_{2}. For La and Pr-nickelates, the superfluid density shows a quadratic temperature dependence, indicating nodal superconductivity in the presence of disorder. Nd-nickelate exhibits complex low-temperature behavior, which we attribute to magnetic impurities. These results are consistent with d-wave pairing.
