Doped planar quantum antiferromagnets with striped phases

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, nonlinear sigma model in two space dimensions. Out theoretical predictions are in quantitative agreement with recent experiments. We focus on (i) the staggered magnetization at T = 0 and (ii) the Néel temperature as functions of doping; these have been measured recently in La2-xSrxCuO4 with 0≤x≤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. © 1996 The American Physical Society.