Contrasting electron-phonon interaction between electron- and hole-doped cuprates

Qinda Guo; Ke-Jun Xu; Magnus H. Berntsen; Antonija Grubišić-Čabo; Maciej Dendzik; Thiagarajan Balasubramanian; Craig Polley; Su-Di Chen; Junfeng He; Yu He; Costel R. Rotundu; Young S. Lee; Makoto Hashimoto; Dong-Hui Lu; Thomas P. Devereaux; Dung-Hai Lee; Zhi-Xun Shen; Oscar Tjernberg

arXiv · 2408.01685

Contrasting electron-phonon interaction between electron- and hole-doped cuprates

Qinda Guo·Ke-Jun Xu·Magnus H. Berntsen·Antonija Grubišić-Čabo·Maciej Dendzik·Thiagarajan Balasubramanian·Craig Polley·Su-Di Chen·Junfeng He·Yu He·Costel R. Rotundu·Young S. Lee·Makoto Hashimoto·Dong-Hui Lu·Thomas P. Devereaux·Dung-Hai Lee·Zhi-Xun Shen·Oscar Tjernberg

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Abstract

Spin- and charge-lattice interactions are potential key factors in the microscopic mechanism of high-temperature superconductivity in cuprates. Although both interactions can dramatically shape the low-energy electronic structure, their phenomenological roles in superconductivity are usually investigated independently. Employing angle-resolved photoemission spectroscopy, we reveal the spectroscopic fingerprint of short-range antiferromagnetic order in conjunction with enhanced electron-phonon interaction in the electron-doped cuprate superconductor $\mathrm{Nd_{1.85}Ce_{0.15}CuO_4}$. The observed mode coupling exhibits a strong momentum dependence that is in striking contrast to the node-antinode dichotomy previously observed in the hole-doped cuprates. Our results reveal an intimate relationship between electron-phonon coupling and antiferromagnetic fluctuations, which collectively sets the stage for unconventional superconductivity in the electron-doped cuprates.

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Qinda Guo, Ke-Jun Xu, Magnus H. Berntsen, Antonija Grubišić-Čabo, Maciej Dendzik, Thiagarajan Balasubramanian, Craig Polley, Su-Di Chen, Junfeng He, Yu He, Costel R. Rotundu, Young S. Lee, Makoto Hashimoto, Dong-Hui Lu, Thomas P. Devereaux, Dung-Hai Lee, Zhi-Xun Shen, Oscar Tjernberg. 2024-08-03. Contrasting electron-phonon interaction between electron- and hole-doped cuprates. https://arxiv.org/abs/2408.01685

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