Numerical evidence of fluctuating stripes in the normal state of high-Tc cuprate superconductors

TL;DR

This paper provides numerical evidence for fluctuating stripe correlations in the normal state of high-Tc cuprate superconductors using determinant quantum Monte Carlo methods on the three-band Hubbard model, supporting experimental observations.

Contribution

It demonstrates dynamical stripe correlations in a realistic model of cuprates, highlighting their role in the normal state physics of high-Tc superconductors.

Findings

Robust stripe correlations across parameters and system sizes

Support for fluctuating stripes explaining experimental phenomena

Insights into intertwined orders in cuprate normal state

Abstract

Upon doping, Mott insulators often exhibit symmetry breaking where charge carriers and their spins organize into patterns known as stripes. For high-Tc superconducting cuprates, stripes are widely suspected to exist in a fluctuating form. Here, we use numerically exact determinant quantum Monte Carlo calculations to demonstrate dynamical stripe correlations in the three-band Hubbard model, which represents the local electronic structure of the Cu-O plane. Our results, which are robust to varying parameters, cluster size, and boundary condition, strongly support the interpretation of a variety of experimental observations in terms of the physics of fluctuating stripes, including the hourglass magnetic dispersion and the Yamada plot of incommensurability vs. doping. These findings provide a novel perspective on the intertwined orders emerging from the cuprates' normal state.