Unveiling Stripe-shaped Charge Density Modulations in Doped Mott Insulators

TL;DR

This paper uses simulations of the doped Hubbard model to reproduce and explain stripe-shaped charge density modulations observed in cuprate superconductors, linking theoretical models with experimental STM data.

Contribution

It introduces a method to compare lattice Green's functions with STM measurements, connecting numerical results with experimental stripe patterns in doped Mott insulators.

Findings

Successfully reproduces experimental stripe and ladder structures

Establishes a link between numerical stripe states and experimental observations

Provides insights into the Mott insulator to superconductor transition

Abstract

Inspired by recent experimental findings, we investigate various scenarios of the doped Hubbard model with impurity potentials. We calculate the lattice Green's function in a finite-size cluster and then map it to the continuum real space, which allows for a direct comparison with scanning-tunneling-microscopy measurements on the local density of states. Our simulations successfully reproduce experimental data, including the characteristic stripe- and ladder-shaped structures observed in cuprate systems. Moreover, our results establish a connection between previous numerical findings on stripe-ordered ground states and experimental observations, thus providing new insights into microscopic mechanisms of the Mott insulator to superconductor transition in cuprates.