论文标题
在高温铜质超导体的拉曼光谱中，由希格斯振荡引起的增强的A1G对称模式的计算
Calculation of an enhanced A1g symmetry mode induced by Higgs oscillations in the Raman spectrum of high-temperature cuprate superconductors
论文作者
论文摘要
在超导体中，安德森·希格斯（Anderson-Higgs）机制允许存在集体振幅（HIGGS）模式，该模式可能主要在非线性拉曼样过程中逐渐融入EV。各向同性超导体的实验性非平衡结果已被解释，超出了包括希格斯模式在内的BCS理论。此外，在各向异性D-WAVE超导体中，预计与其他模式的强烈相互作用效应。在这里，我们从新的角度计算了希格斯模式的拉曼贡献，包括多体Higgs振荡效果及其在常规自发的拉曼光谱法中的后果。我们的结果表明，对D波超导体中A1G对称性拉曼光谱的强度有显着贡献。为了测试我们的理论，我们预测了THZ淬灭光学探针时间依赖性反射率实验中可测量的特征振荡的存在。
In superconductors the Anderson-Higgs mechanism allows for the existence of a collective amplitude (Higgs) mode which can couple to eV-light mainly in a non-linear Raman-like process. The experimental non-equilibrium results on isotropic superconductors have been explained going beyond the BCS theory including the Higgs mode. Furthermore, in anisotropic d-wave superconductors strong interaction effects with other modes are expected. Here we calculate the Raman contribution of the Higgs mode from a new perspective, including many-body Higgs oscillations effects and their consequences in conventional, spontaneous Raman spectroscopy. Our results suggest a significant contribution to the intensity of the A1g symmetry Raman spectrum in d-wave superconductors. In order to test our theory, we predict the presence of measurable characteristic oscillations in THz quench-optical probe time-dependent reflectivity experiments.
