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

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

2006-02-17

arxiv.org/abs/cond-mat/0602406v2

JETP 103 (2006) 415

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 8 figures

Scientific paper

10.1134/S1063776106090111

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.

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