论文标题
在强相关的无限层镍中的超导不稳定
Superconducting Instabilities in Strongly-Correlated Infinite-Layer Nickelates
论文作者
论文摘要
在无限层镍盐中发现超导性已经为令人着迷的一类非常规超导体增添了新的材料家族。通过融合低能电子自由度的密切相关的多轨本质，我们计算出与无限层镍相关的磁波动的领先超导不稳定。具体而言，通过正确地包括Ni $ d_ {x^2-y^2} $和$ d_ {z^2} $轨道的掺杂依赖性以及自兴奋剂频段，我们发现了从$ d $ - d $ - 波配对的过渡到Nodal $ s_ \ s_ \ s_ \ pm $ s $ supperconductive，由强度fluctivation do $ do;国家。我们根据最近的隧道和穿透深度实验，讨论所得超导冷凝物的特性，以探测这些材料的详细超导间隙结构。
The discovery of superconductivity in infinite-layer nickelates has added a new family of materials to the fascinating growing class of unconventional superconductors. By incorporating the strongly correlated multi-orbital nature of the low-energy electronic degrees of freedom, we compute the leading superconducting instability from magnetic fluctuations relevant for infinite-layer nickelates. Specifically, by properly including the doping dependence of the Ni $d_{x^2-y^2}$ and $d_{z^2}$ orbitals as well as the self-doping band, we uncover a transition from $d$-wave pairing symmetry to nodal $s_\pm$ superconductivity, driven by strong fluctuations in the $d_{z^2}$-dominated orbital states. We discuss the properties of the resulting superconducting condensates in light of recent tunneling and penetration depth experiments probing the detailed superconducting gap structure of these materials.
