Normal state properties in the cuprates and their Fermi liquid based interpretation

Combined effects of post-growth thermal treatment and chemical substitution on physical properties of CaFe₂As₂

“…They are believed to be an example of the Mott insulator, in which electronic conductivity is blocked by the electron-electron Coulomb repulsion (Anderson, 1987;Tachiki and Matsumoto, 1990;Levin et al, 1991 Commonly this region is known as the "pseudogap" state (Levi, 1993;Maple et al, 2008). The discussion of pseudogap is beyond the scope of this work.…”

SPIN DYNAMICS IN THE NORMAL STATE OF HIGH-Tc SUPERCONDUCTORS

“…[9] A more complete analysis of the normal state properties in the metallic cuprates along similar lines can be found in Ref. [10], which also contains more extensive references.…”

“…[58] These features are strikingly similar with spin fluctuation spectra in the heavy fermion systems. [10,31] In charge responses, however, low energy scales appear only in non-optimally-doped cuprates while intermediate energy crossover does not seem to occur, as demonstrated in the ubiquitous linear temperature dependence in resistivity and, perhaps more strikingly, the quadratic temperature dependence in the Hall angle over a wide range of temperatures [59]. At higher energies, not much is known about spin dynamics in the metallic cuprates, while various anomalous features in the charge dynamics have been found through optical, Raman, and photoemission spectroscopy studies.…”

“…We consider here the scenario that the electron localization and the antiferromagnetic ordering in the half-filled Mott insulator evolve into two corresponding incipient instabilities when doped. [10] The incipient electron localization is characterized by an enhanced quasiparticle mass, while the incipient magnetic instability is manifested as an effective exchange coupling between the quasiparticles. Phenomenologically, such a picture is consistent with the existence of a Luttinger Fermi surface, the small and doping dependent plasma frequencies, and the presence of doping dependent magnetic fluctuations which we will analyze in detail.…”

Band crossing and novel low-energy behaviour in a mean field theory of a three-band model on a Cu - O lattice

“…A number of versions of the extended three-band Hubbard models have been studied recently [1][2][3][4][5] with the expectation that they are relevant to the physics of the high-T c cuprates.…”