Non-Fermi liquid behavior in the stripe phase of the extended Hubbard model |
| |
Authors: | R Citro M Marinaro |
| |
Institution: | (1) Dipartimento di Fisica “E.R. Caianiello”, Università di Salerno and Unità INFM di Salerno Via S. Allende, 84081 Baronissi (Sa), Italy, IT |
| |
Abstract: | 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.
Received 28 February 2002 / Received in final form 7 May 2002 Published online 9 July 2002 |
| |
Keywords: | 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 |
本文献已被 SpringerLink 等数据库收录! |