title: Dynamics of metallic stripes in cuprates.
abstract: We study the dynamics of metallic vertical stripes in cuprates within the three-band Hubbard model based on a recently developed time-dependent Gutzwiller approximation. As doping increases, the optical conductivity shows transfer of spectral weight from the charge-transfer band towards (i) an incoherent band centered at 1.3 eV, (ii) a Drude peak, due mainly to motion along the stripe, and (iii) a low-energy collective mode which softens with doping and merges with (ii) at optimum doping in good agreement with experiment. The softening is related to the quasidegeneracy between Cu-centered and O-centered mean-field stripe solutions close to optimal doping.
authors.affiliation: CONICET, Centro Atómico Bariloche, 8400 S. C. de Bariloche, Argentina.
authors.forename: J
authors.initials: J
authors.lastname: Lorenzana
authors.forename: G
authors.initials: G
authors.lastname: Seibold