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- W2005179439 abstract "In this paper a mean-field theory for the spin-liquid paramagnetic non-superconducting phase of the p- and n-type high-Tc cuprates is developed. This theory applied to the effective t-t'-t′′-J* model with the ab initio calculated parameters and with the three-site correlated hoppings. The static spin-spin and kinematic correlation functions beyond Hubbard-I approximation are calculated self-consistently. The evolution of the Fermi surface and band dispersion is obtained for the wide range of doping concentrations x. For p-type systems the three different types of behavior are found and the transitions between these types are accompanied by the changes in the Fermi surface topology. Thus a quantum phase transitions take place at x = 0.15 and at x = 0.23.Due to the different Fermi surface topology we found for n-type cuprates only one quantum critical concentration, x = 0.2. The calculated doping dependence of the nodal Fermi velocity and the effective mass are in good agreement with the experimental data." @default.
- W2005179439 created "2016-06-24" @default.
- W2005179439 creator A5063949580 @default.
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- W2005179439 date "2007-06-01" @default.
- W2005179439 modified "2023-09-26" @default.
- W2005179439 title "Doping-dependent evolution of low-energy excitations and quantum phase transitions within an effective model for high-Tc copper oxides" @default.
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- W2005179439 doi "https://doi.org/10.1140/epjb/e2007-00179-2" @default.
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