Fermi Liquid without Quasiparticles and Electron Spectral Functions of Two-Dimensional High-$T_c$ Superconductors

Abstract

Properties of strongly correlated two-dimensional (2D) electron systems in solids are studied on the assumption that these systems undergo a phase transition, called fermion condensation, whose characteristic feature is flattening of the electron spectrum $ε({\pf p})$. Unlike the previous models in the present study, the decay of single-particle states is properly taken into account. Remarkably, the value of the topological charge ($N=1/2$) remains unchanged, supporting the view that systems with a fermion condensate form a separate class of Fermi liquids. Results of calculations are found to be in qualitative agreement with ARPES data.

13 pages, 3 figures

References in corpus (2)

• Bosonic Mode Mixing in the Superconducting State Spectral Function of Bi_2Sr_2CaCu_2O_{8+delta}
• Temperature Dependent Scattering Rates at the Fermi Surface of Optimally Doped Bi 2212

Cited by in corpus (2)

• Topology of the Fermi Surface Beyond the Quantum Critical Point
• Fate of the Wiedemann-Franz law near quantum critical points of electron systems in solids