Anomalously Strong Near-Neighbor Attraction in Doped 1D Cuprate Chains

Abstract

In the cuprates, one-dimensional chain compounds provide a unique opportunity to understand the microscopic physics due to the availability of reliable theories. However, progress has been limited by the inability to controllably dope these materials. Here, we report the synthesis and spectroscopic analysis of the one-dimensional cuprate Ba${}_{2-x}$Sr${}_x$CuO${}_{3+\delta }$ over a wide range of hole doping. Our angle-resolved photoemission experiments reveal the doping evolution of the holon and spinon branches. We identify a prominent folding branch whose intensity fails to match predictions of the simple Hubbard model. An additional strong near-neighbor attraction, which may arise from coupling to phonons, quantitatively explains experiments for all accessible doping levels. Considering structural and quantum chemistry similarities among cuprates, this attraction will play a similarly crucial role in the high-$T_C$ superconducting counterparts

References in corpus (5)

• Spin-Orbital Separation in the quasi 1D Mott-insulator Sr2CuO3
• A Systematic Study of Electron-Phonon Coupling to Oxygen Modes Across the Cuprates
• Anomalously Strong Near-Neighbor Attraction in Doped 1D Cuprate Chains
• Spectral Properties of Holstein and Breathing Polarons
• Electron-phonon coupling in the self-consistent Born approximation of the t-J model

Cited by in corpus (2)

• Anomalously Strong Near-Neighbor Attraction in Doped 1D Cuprate Chains
• Particle-hole asymmetry in the dynamical spin and charge structure factors of the corner-shared one-dimensional cuprates