Superconductivity, nematicity, and charge density wave in high-Tc cuprates: A common thread

TL;DR

This study uses quantum Monte Carlo simulations of an extended three-band model to show that attractive interactions between oxygen orbitals enhance superconductivity, nematicity, and charge density waves in high-Tc cuprates.

Contribution

It demonstrates that oxygen orbital attraction is a unifying factor linking superconductivity and charge order phenomena in cuprates.

Findings

Enhanced d-wave pairing correlations with increasing $V_{OO}$.

Rapid increase in nematic charge structure factor near $ extbf{q}=(0,0)$.

Attraction between oxygen orbitals promotes both superconductivity and charge order.

Abstract

To address the issues of superconducting and charge properties in high-T$_c$ cuprates, we perform a quantum Monte Carlo study of an extended three-band Emery model, which explicitly includes attractive interaction $V_{OO}$ between oxygen orbitals. In the physically relevant parameter range, we find that $V_{OO}$ acts to strongly enhance the long-range part of d-wave pairing correlation, with a clear tendency to form long-range superconducting order in the thermodynamic limit. Simultaneously, increasing $|V_{OO}|$ renders a rapid increase of the nematic charge structure factor at most of wavevectors, especially near $\textbf{q}=(0,0)$, indicating a dramatic enhancement of nematicity and charge density waves. Our findings suggest that the attraction between oxygen orbitals in high-T$_c$ cuprates is a common thread linking their superconducting and charge properties.