Stripes and the t-J model

TL;DR

This paper uses exact diagonalization to study the two-dimensional t-J model at specific doping and coupling parameters, revealing low-energy uniform states and excited states with charge density wave structures that resemble striped phases observed in experiments.

Contribution

It identifies excited states with stripe-like charge density waves in the t-J model, providing insights into possible origins of stripe phases in cuprates and nickelates.

Findings

Low-energy states are uniform, not striped.

Excited states exhibit charge density wave structures.

Some structures match experimental neutron scattering data.

Abstract

We investigate the two-dimensional t-J model at a hole doping of x = 1/8 and J/t = 0.35 with exact diagonalization. The low-energy states are uniform (not striped). We find numerous excited states with charge density wave structures, which may be interpreted as striped phases. Some of these are consistent with neutron scattering data on the cuprates and nickelates.