论文标题
Cecoin5中隐藏轨道顺序和超导性的相互作用
Interplay of Hidden Orbital Order and Superconductivity in CeCoIn5
论文作者
论文摘要
可视化原子 - 轨道自由度是扫描显微镜中的边界挑战。某些类型的轨道顺序实际上是正常散射技术无法察觉的,因为它们不会减少整体晶体晶格对称性。一个很好的例子是DXZ/DYZ(π,π)轨道晶格中的轨道顺序。为了增强可检测性,在这里,我们考虑了正常和超导阶段的这种(π,π)轨道阶的准散射干扰(QPI)特征。该理论表明,轨道顺序产生的特异性QPI特异性QPI标志应在超导阶段强烈出现。超导CECOIN5中的sublattice分辨QPI可视化然后在晶格 - 实质性杂质原子上揭示了两种正交QPI模式。我们分析了这两种正交QPI模式的能量依赖性,并发现在E = 0接近E = 0的强度,如(π)轨道阶是Inte时所预测的,并用D-WAVE超导性wave。因此,由Sublattice分辨的超导QPI技术代表了一种研究隐藏轨道顺序的新方法。
Visualizing atomic-orbital degrees of freedom is a frontier challenge in scanned microscopy. Some types of orbital order are virtually imperceptible to normal scattering techniques because they do not reduce the overall crystal lattice symmetry. A good example is dxz/dyz (π,π) orbital order in tetragonal lattices. For enhanced detectability, here we consider the quasiparticle scattering interference (QPI) signature of such (π,π) orbital order in both normal and superconducting phases. The theory reveals that sublattice-specific QPI signatures generated by the orbital order should emerge strongly in the superconducting phase. Sublattice-resolved QPI visualization in superconducting CeCoIn5 then reveals two orthogonal QPI patterns at lattice-substitutional impurity atoms. We analyze the energy dependence of these two orthogonal QPI patterns and find the intensity peaked near E=0, as predicted when such (π) orbital order is inte,πrtwined with d-wave superconductivity. Sublattice-resolved superconductive QPI techniques thus represent a new approach for study of hidden orbital order.