Phonon-Mediated Long-Range Attractive Interaction in One-Dimensional Cuprates

Establishing a minimal microscopic model for cuprates is a key step towards the elucidation of a high-Tc mechanism. By a quantitative comparison with a recent in situ angle-resolved photoemission spectroscopy measurement in doped 1D cuprate chains, our simulation identifies a crucial contribution from long-range electron-phonon coupling beyond standard Hubbard models. Using reasonable ranges of coupling strengths and phonon energies, we obtain a strong attractive interaction between neighboring electrons, whose strength is comparable to experimental observations. Nonlocal couplings play a significant role in the mediation of neighboring interactions. Considering the structural and chemical similarity between 1D and 2D cuprate materials, this minimal model with long-range electron-phonon coupling will provide important new insights on cuprate high-Tc superconductivity and related quantum phases.

Automated summary

This study establishes a minimal model for cuprates and highlights the crucial contribution of long-range electron-phonon coupling beyond standard Hubbard models. The research findings suggest a strong attractive interaction between neighboring electrons, comparable to experimental observations, due to nonlocal couplings mediating neighboring interactions. The structural and chemical similarities between 1D and 2D cuprate materials provide important insights for understanding cuprate high-Tc superconductivity and related quantum phases.