Doped Planar Quantum Antiferromagnets with Striped Phases

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 T0ex0ex=0ex0ex0 and (ii) the N\'eel temperature as functions of doping; these have been measured recently in La_2-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.