论文标题
超导铜中的批量电荷密度波和电子偶联
Bulk charge density wave and electron-phonon coupling in superconducting copper oxychlorides
论文作者
论文摘要
现在，几乎所有高温超导粉提土中报道了散装电荷密度波，而一个特定家族的明显例外：氧化氯化物。在这里，我们使用谐振非弹性X射线散射来揭示这些材料中的大量电荷密度波。将谐振非弹性X射线散射与非均匀非弹性X射线散射相结合，我们研究了晶格激发与电荷密度波之间的相互作用，并证明了在电荷密度波波量而观的Cu-O键键攻击模式的声子异常。我们建议，这种电子 - 音波异常发生在存在从电荷密度波发出并与Cu-O键键拉伸的声子相互作用的情况下出现的分散电荷激发。我们的结果为将来的研究铺平了道路，结合了批量和表面探针，以研究铜氧氯化物家族中电荷密度波的静态和动力学特性。
Bulk charge density waves are now reported in nearly all high-temperature superconducting cuprates, with the noticeable exception of one particular family: the copper oxychlorides. Here, we used resonant inelastic X-ray scattering to reveal a bulk charge density waves in these materials. Combining resonant inelastic X-ray scattering with non-resonant inelastic X-ray scattering, we investigate the interplay between the lattice excitations and the charge density wave, and evidence the phonon anomalies of the Cu-O bond-stretching mode at the charge density wave wave-vector. We propose that such electron-phonon anomalies occur in the presence of dispersive charge excitations emanating from the charge density wave and interacting with the Cu-O bond-stretching phonon. Our results pave the way for future studies, combining both bulk and surface probes, to investigate the static and dynamical properties of the charge density wave in the copper oxychloride family.
