Traces of electron-phonon coupling in one-dimensional cuprates.
Traces of electron-phonon coupling in one-dimensional cuprates.
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DOI：
10.1038/s41467-023-38408-6
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发表时间：
2023-05-30
影响因子：
16.6
通讯作者：
Devereaux, Thomas P.
中科院分区：
文献类型：
--
作者：
Tang, Ta;Moritz, Brian;Peng, Cheng;Shen, Zhi-Xun;Devereaux, Thomas P.
一维（1D）铜酸盐材料中某些光谱特征的出现归因于电子之间强的、扩展的吸引耦合。在这里，使用Hubbard扩展Holstein模型上的时间相关密度矩阵重整化群方法，我们证明了扩展的电子-声子（e-ph）耦合是产生这种有吸引力的相互作用的一个明显选择，这种相互作用再现了在角分辨光电发射实验中观察到的光谱特征和掺杂依赖性：减小的3 kF光谱权重、holon折叠分支的突出光谱强度和正确的霍隆带宽。虽然扩展的e-ph耦合并没有定性地改变一维系统的基态相比，哈伯德模型，它定量地增强了长程超导关联和抑制自旋关联。这种扩展的e-ph相互作用可能是描述结构相似的二维高温超导层状铜氧化物物理学中一个重要的缺失成分，它可能会打破纠缠有序之间的平衡，有利于均匀的d波超导性。最近的光电子发射实验报道了一个强大的最近邻吸引力在一维铜酸盐，可能源于远程电子-声子耦合。通过使用国家的最先进的数值方法，作者表明，哈伯德模型与扩展的电子-声子项再现实验功能。
The appearance of certain spectral features in one-dimensional (1D) cuprate materials has been attributed to a strong, extended attractive coupling between electrons. Here, using time-dependent density matrix renormalization group methods on a Hubbard-extended Holstein model, we show that extended electron-phonon (e–ph) coupling presents an obvious choice to produce such an attractive interaction that reproduces the observed spectral features and doping dependence seen in angle-resolved photoemission experiments: diminished 3kF spectral weight, prominent spectral intensity of a holon-folding branch, and the correct holon band width. While extended e–ph coupling does not qualitatively alter the ground state of the 1D system compared to the Hubbard model, it quantitatively enhances the long-range superconducting correlations and suppresses spin correlations. Such an extended e–ph interaction may be an important missing ingredient in describing the physics of the structurally similar two-dimensional high-temperature superconducting layered cuprates, which may tip the balance between intertwined orders in favor of uniform d-wave superconductivity. Recent photo-emission experiments reported a strong nearest-neighbour attraction in a 1D cuprate, possibly originating from long-range electron-phonon coupling. By using state-of-the-art numerical methods, the authors show that a Hubbard model with extended electron-phonon terms reproduces experimental features.
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影响因子：
64.8
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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作者：
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