Diagonal stripes in the spin glass phase of cuprates

TL;DR

This paper investigates the origin of diagonal incommensurate spin scattering in the spin glass phase of lanthanum cuprates, proposing stripe formation as a key mechanism through Gutzwiller approximation analysis.

Contribution

It introduces two stable diagonal stripe structures in cuprates and analyzes their stability compared to vertical stripes, advancing understanding of spin glass phases.

Findings

Two types of diagonal stripe structures are stable: site-centered and ferromagnetic stair-case.

Diagonal stripes can have different hole fillings, affecting their stability.

Diagonal stripe formation may explain spin scattering in cuprates.

Abstract

Based on the unrestricted Gutzwiller approximation we study the possibility that the diagonal incommensurate spin scattering in the spin glass phase of lanthanum cuprates originates from stripe formation. Similar to the metallic phase two types of diagonal stripe structures appear to be stable: (a) site-centered textures which have one hole per site along the stripe and (b) ferromagnetic stair-case structures which are the diagonal equivalent to bond-centered stripes in the metallic phase and which on average have a filling of 3/4 holes per stripe site. We give a detailed analysis of the stability of both diagonal textures with regard to the vertical ones.