Doping-dependent evolution of low-energy excitations and quantum phase transitions within effective model for High-Tc copper oxides

Simple item page
dc.creatorKorshunov, M. M.
dc.creatorOvchinnikov, S. G.
dc.date2006-10-20
dc.date.accessioned2026-07-07T08:22:40Z
dc.date.available2026-07-07T08:22:40Z
dc.descriptionIn this paper a mean-field theory for the spin-liquid paramagnetic non-superconducting phase of the p- and n-type High-$T_c$ cuprates is developed. This theory applied to the effective $t-t'-t''-J^*$ model with the {\it 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.
dc.description8 pages
dc.identifierhttps://arxiv.org/abs/cond-mat/0610580
dc.identifierhttp://arxiv.org/abs/cond-mat/0610580
dc.identifierEur. Phys. J. B 57, 271-278 (2007)
dc.identifierdoi:10.1140/epjb/e2007-00179-2
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/135728
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleDoping-dependent evolution of low-energy excitations and quantum phase transitions within effective model for High-Tc copper oxides
dc.typetext

Files

Collections

arXiv