Doped planar quantum antiferromagnets with striped phases

TL;DR

This paper models doped cuprate antiferromagnets with striped phases using an anisotropic non-linear sigma model, achieving quantitative agreement with experiments on magnetization and Néel temperature, supporting the striped phase hypothesis.

Contribution

It introduces a theoretical framework using an anisotropic non-linear sigma model to describe striped phases in doped cuprates, aligning with experimental data.

Findings

Quantitative agreement with experimental measurements of magnetization and Néel temperature.

Support for the striped phase as the low doping configuration in cuprates.

Abstract

We study the properties of the striped phases that have been proposed for the doped cuprate planar quantum antiferromagnets. We invoke an effective, spatially anisotropic, non-linear sigma model in two space dimensions. Our theoretical predictions are in {\it quantitative} agreement with recent experiments. We focus on (i) the staggered magnetization at $T=0$ and (ii) the N\'eel temperature, as functions of doping; these have been measured recently in La${}_{2-x}$ Sr${}_x$ Cu O${}_4$ with $0 \leq x \leq 0.018$. Good agreement with experiment is obtained using parameters determined previously and independently for this system. These results support the proposal that the low doping (antiferromagnetic) phase of the cuprates has a striped configuration.