论文标题
在非常规超导体的短时动力学中，nematicitity和Bardasis-Schrieffer模式之间的相互作用
Interplay between nematicity and Bardasis-Schrieffer modes in the short-time dynamics of unconventional superconductors
论文作者
论文摘要
通过最近的实验的激励，表明nematicity在基于铁的和铜矿高-TC超导体的相图中的重要性，我们研究了nematicities对非平衡状态超导状态内集体模式的影响。特别是，我们在系统的短时动力学中考虑了具有竞争性和S-和D波超导订单的系统的签名。在旋转的对称状态下，我们表明Bardasis-Schrieffer模式与亚尺寸配对相对应，与列的集体模式杂交，并合并为单个间隙模式，混合消失仅在接近相边界附近。对于D-WAVE基态，我们发现列不相互作用抑制了短时动力学中集体振荡的阻尼。此外，我们发现，即使在列表S+D-Wave超导状态内，Bardasis-Schrieffer样模式也会导致有序参数振荡，从而在很大程度上取决于两个配对对称性之间的竞争。我们讨论了我们的结果与高-TC超导体的最新泵探针实验的联系。
Motivated by the recent experiments suggesting the importance of nematicity in the phase diagrams of ironbased and cuprate high-Tc superconductors, we study the influence of nematicity on the collective modes inside the superconducting state in a non-equilibrium. In particular, we consider the signatures of collective modes in short-time dynamics of a system with competing nematic and s- and d-wave superconducting orders. In the rotationally symmetric state, we show that the Bardasis-Schrieffer mode, corresponding to the subdominant pairing, hybridizes with the nematic collective mode and merges into a single in-gap mode, with the mixing vanishing only close to the phase boundaries. For the d-wave ground state, we find that nematic interaction suppresses the damping of the collective oscillations in the short-time dynamics. Additionally, we find that even inside the nematic s+d-wave superconducting state, a Bardasis-Schrieffer-like mode leads to order parameter oscillations that strongly depend on the competition between the two pairing symmetries. We discuss the connection of our results to the recent pump-probe experiments on high-Tc superconductors.
