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arXiv 2210.09288cond-mat.str-elcond-mat.supr-con
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一维铜氧化物中电子-声子耦合的踪迹

Traces of Electron-Phonon Coupling in One-Dimensional Cuprates

Ta Tang, Brian Moritz, Cheng Peng, Z. X. Shen, Thomas P. Devereaux

AI总结:

利用含时密度矩阵重正化群方法研究Hubbard-扩展Holstein模型,发现扩展电子-声子耦合能重现一维铜氧化物实验光谱特征,定量增强长程超导关联并抑制自旋关联,可能是理解二维高温超导层状铜氧化物交织序平衡的关键缺失成分。

摘要:

一维(1D)铜氧化物材料中某些光谱特征的出现,被归因于电子之间强烈的扩展吸引耦合。在此,通过对Hubbard-扩展Holstein模型使用含时密度矩阵重正化群方法,我们表明扩展电子-声子(e-ph)耦合是产生这种吸引相互作用的明显选择,它能重现角分辨光电子能谱实验中观察到的光谱特征和掺杂依赖性:减弱的$3k_F$谱权重、显著的holon折叠支谱强度以及正确的holon能带宽度。与Hubbard模型相比,尽管扩展e-ph耦合未在定性上改变1D系统的基态,但它定量地增强了长程超导关联并抑制了自旋关联。这种扩展e-ph相互作用可能是描述结构相似的高温超导层状铜氧化物物理时缺失的重要成分,它可能打破交织序之间的平衡,从而倾向于均匀的$d$波超导态。

英文摘要:

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 ({\it 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 $3k_F$ spectral weight, prominent spectral intensity of a holon-folding branch, and the correct holon band width. While extended {\it 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 {\it 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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