Non - Fermi Liquid Behavior in Fluctuating Gap Model: From Pole to Zero of the Green's function

Abstract

We analyze non - Fermi liquid (NFL) behavior of fluctuating gap model (FGM) of pseudogap behavior in both 1D and 2D. We discuss in detail quasiparticle renormalization (Z - factor), demonstrating a kind of "marginal" Fermi liquid or Luttinger liquid behavior and topological stability of the "bare" Fermi surface (Luttinger theorem). In 2D case we discuss effective picture of Fermi surface "destruction" both in "hot spots" model of dielectric (AFM, CDW) pseudogap fluctuations, as well as for qualitatively different case of superconducting d - wave fluctuations, reflecting NFL spectral density behavior and similar to that observed in ARPES experiments on copper oxides.

arXiv comment11 pages, 8 figures

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Cited by in corpus (7)

• Quantum phase transitions from topology in momentum space
• Modeling the Fermi arc in underdoped cuprates
• Doped high-Tc cuprate superconductors elucidated in the light of zeros and poles of electronic Green's function
• Generalized dynamical mean-field theory in physics of strongly correlated systems
• Generalized unparticles, zeros of the Green function, and momentum space topology of the lattice model with overlap fermions
• Monte Carlo study of thermal fluctuations and Fermi-arc formation in d-wave superconductors
• Momentum space topology in the lattice gauge theory