https://doi.org/10.1140/epjb/e2002-00199-4
Non-Fermi liquid behavior in the stripe phase of the extended Hubbard model
Dipartimento di Fisica “E.R. Caianiello”, Università di Salerno
and Unità INFM di Salerno Via S. Allende, 84081 Baronissi (Sa), Italy
Corresponding author: a citro@sa.infn.it
Received:
28
February
2002
Revised:
7
May
2002
Published online:
9
July
2002
Within a strong-coupling perturbative approach, based on a Cumulant Expansion of the extended single-band Hubbard model, we show that the on-shell inverse scattering time deviates from the normal Fermi-liquid behavior near the points of the Fermi surface connected by the characteristic wave-vector of an incommensurate charge density wave. The violation of the Fermi liquid behavior is associated with a square root behavior of the inverse quasiparticle lifetime in proximity of a stripe phase. Some relevant features observed in ARPES experiments on Bi2212 are qualitatively reproduced.
PACS: 74.20.-z – Theories and models of superconducting state / 71.45.Lr – Charge-density-wave systems / 71.10.Hf – Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002
