Theory of spin fluctuations in striped phases of doped antiferromagnetic cuprates

We study the properties of generalized striped phases of doped cuprate planar quantum antiferromagnets. We invoke an effective, spatially anisotropic, nonlinear sigma model in two space dimensions. Our theoretical predictions are inquantitative agreement with recent experiments in La{2-x}SrxCuO4 with 0≤ x ≤ 0.018. We focus on (i) the magnetic correlation length, (ii) the staggered magnetization at T= 0, and (iii) the Néel temperature, as functions of doping, 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.