Electronic Theory for the Transition from Fermi-Liquid to Non-Fermi-Liquid Behavior in High-T${}_c$ Superconductors

Abstract

We analyze the breakdown of Fermi-liquid behavior within the 2D Hubbard model as function of doping using our recently developed numerical method for the self consistent summation of bubble and ladder diagrams. For larger doping concentrations the system behaves like a conventional Fermi-liquid and for intermediate doping similar to a marginal Fermi-liquid. However, for smaller doping pronounced deviations from both pictures occur which are due to the increasing importance of the short range antiferromagnetic spin fluctuations. This is closely related to the experimental observed shadow states in the normal state of high-$T_c$ superconductors. Furthermore, we discuss the implications of our results for transport experiments.

11 pages (REVTeX) with 4 figures (Postscript)

References in corpus (1)

• Correlated Electrons in High Temperature Superconductors

Cited by in corpus (5)

• A Survey of the Van Hove Scenario for High-T_c Superconductivity With Special Emphasis on Pseudogaps and Striped Phases
• Theory for Superconducting Properties of the Cuprates: Doping Dependence of the Electronic Excitations and Shadow States
• Single-particle properties of a model for coexisting charge and spin quasi-critical fluctuations coupled to electrons
• Theory for Dynamical Short Range Order and Fermi Surface Volume in Strongly Correlated Systems
• Theory for the Interdependence of High-T${}_c$ Superconductivity and Dynamical Spin Fluctuations