Dynamics of metallic stripes in cuprates

Details Dynamics of metallic stripes in cuprates Dynamics of metallic stripes in cuprates

2002-07-11

arxiv.org/abs/cond-mat/0207291v3

Phys. Rev. Lett. 90, 066404 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures, corrections to Fig.5

Scientific paper

10.1103/PhysRevLett.90.066404

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 1.3eV, {ii} a Drude peak, mainly due to motion along the stripe, {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.

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