Properties of normal and superconducting phases in the low-energy models of high-$T_c$ cuprates

Details Properties of normal and superconducting phases in the low-energy models of high-$T_c$ cuprates Properties of normal and superconducting phases in the low-energy models of high-$T_c$ cuprates

2004-05-13

arxiv.org/abs/cond-mat/0405287v1

Physics

Condensed Matter

Superconductivity

10 pages, 3 figures, IOP LaTeX

Scientific paper

In the framework of the effective low-energy model for High-$T_c$ cuprates with account for three-centers interaction terms and spin fluctuations the properties of normal and superconducting phases of p- and n-type cuprates are investigated. Microscopic model parameters were obtained from ARPES data on undoped compounds. Obtained evolution of the chemical potential with doping, Fermi Surface at optimal doping, and $T_c(x)$ phase diagram for n-type cuprates are in remarkably good agreement with the experiment. It is shown that the spin-exciton mechanism due to singlet-triplet hybridization takes place in p-type, although it is too small to reproduce observed qualitative difference between p- and n-type cuprates.

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