论文标题
SR $ _2 $ ruo $ _4 $从微弱的排斥互动中的波动驱动的超导率
Fluctuation-driven superconductivity in Sr$_2$RuO$_4$ from weak repulsive interactions
论文作者
论文摘要
我们为与SR $ _2 $ RUO $ _4 $有关的模型提供了领先的超导稳定性的结果，以在非常弱耦合极限的情况下获得自旋 - 触发介导的超导性。该理论以相关磁各向异性的形式结合了带结构和配对内核中的自旋轨道耦合（SOC）效应。发现领先的超导阶段为$ d_ {x^2-y^2} $和nodal $ s $ - 波状态。但是，奇怪的螺旋螺旋解决方案可以成为小型SOC和Hund在弱$ U $ limit中的$ j $的领导，或者在较大的Hubbard- $ u $的较大值的情况下与大型SOC和$ j $相反。从未发现奇怪的手性溶液是领先的。最后，我们讨论了不同探索的参数制度中所得超导光谱差距的形式。
We provide results for the leading superconducting instabilities for a model pertaining to Sr$_2$RuO$_4$ obtained within spin-fluctuation mediated superconductivity in the very weak-coupling limit. The theory incorporates spin-orbit coupling (SOC) effects both in the band structure and in the pairing kernel in the form of associated magnetic anisotropies. The leading superconducting phase is found to be $d_{x^2-y^2}$ and a nodal $s$-wave state. However, the odd-parity helical solution can become leading either for small SOC and Hund's coupling $J$ in the weak $U$-limit, or in the opposite limit with large SOC and $J$ at larger values of the Hubbard-$U$. The odd-parity chiral solution is never found to be leading. Finally we discuss the form of the resulting superconducting spectral gaps in the different explored parameter regimes.
