Stripe formation in electron-doped cuprates

TL;DR

This paper explores how charge domain walls, or stripes, form in electron-doped cuprates using an advanced Hubbard model approach, revealing unique stripe characteristics compared to hole-doped counterparts.

Contribution

It introduces a combined Hartree-Fock and slave-boson method to study stripe formation in electron-doped cuprates, highlighting differences from hole-doped systems.

Findings

Stripe formations occur in specific directions with one electron per stripe site.

Distinct stripe fillings, directions, and widths compared to hole-doped cuprates.

Observable consequences of these differences are discussed.

Abstract

We investigate the formation of charge domain walls in an electron-doped extended Hubbard model for the superconducting cuprates. Within an unrestricted Hartree-Fock approach, extended by the introduction of slave-bosons to obtain a more proper treatment of strong correlations, we demonstrate the occurrence of stripes in the (1,1) and (1,-1) directions having one doped electron per stripe site. The different filling, direction and width of these electron-doped stripes with respect to those obtained in the hole-doped systems have interesting observable consequences, which are discussed.