论文标题
在长期互动的情况下
Higher angular momentum pairing states in Sr$_2$RuO$_4$ in the presence of longer-range interactions
论文作者
论文摘要
SR $ _2 $ ruo $ _4 $的超导对称性仍然是一个难题。已经提出了用于调和多个关键实验的时间 - 反转对称破坏$ d_ {x^2-y^2} + ig_ {xy（x^2-y^2）} $配对。但是，其稳定性尚不清楚。在这项工作中，我们从理论上研究了SR $ _2 $ ruo $ _4 $中的超导不稳定性，包括在随机相位近似中存在局部和长期相互作用的情况下，包括自旋轨道耦合（SOC）的效果。我们表明，在$ b_ {2g} $ channel或非本地互动的轨道上，第二个最近的邻居排斥以及非本地SOC都会对两种$ d_ {x^2-y^2} $ - 和$ g $ -Wave配对频道的稳定性产生重大影响。我们分析已实现的$ d_ {x^2-y^2} + ig $，$ s^{\ prime} + id_ {xy} $的属性，例如骑士移动和自发边缘电流，以及在不同的参数空间中的混合螺旋配对，并发现$ d_ {x^2-y^2} + good solive inst offeraction fasterifection fasterifection。
The superconducting symmetry of Sr$_2$RuO$_4$ remains a puzzle. Time-reversal symmetry breaking $d_{x^2-y^2} + ig_{xy(x^2-y^2)}$ pairing has been proposed for reconciling multiple key experiments. However, its stability remains unclear. In this work, we theoretically study the superconducting instabilities in Sr$_2$RuO$_4$, including the effects of spin-orbit coupling (SOC), in the presence of both local and longer-range interactions within a random phase approximation. We show that the inclusion of second nearest neighbor repulsions, together with non-local SOC in the $B_{2g}$ channel or orbital-anisotropy of the non-local interactions, can have a significant impact on the stability of both $d_{x^2-y^2}$- and $g$-wave pairing channels. We analyze the properties, such as Knight shift and spontaneous edge current, of the realized $d_{x^2-y^2} + ig$, $s^{\prime}+id_{xy}$ and mixed helical pairings in different parameter spaces and find that the $d_{x^2-y^2} + ig$ solution is in better agreement with the experimental data.
