2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/26062Recently, 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 figuresStrongly Correlated Electronstext