Comments on "Dimerization Induced by the RKKY Interaction"
arXiv:cond-mat/0503476
Abstract
Recently, Xavier et al. claimed the existence of an insulating spin dimer state in the one-dimensional Kondo lattice model at quarter-filling amidst the paramagnetic metallic phase. In this comment we show that the dimer-dimer correlation decays algebraically at long distances and the charge gap vanishes in the bulk limit.
1 page, 2 figures