Comments on "Dimerization Induced by the RKKY Interaction"
  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. 
Naokazu Shibata, Chisa Hotta