https://doi.org/10.1140/epjb/e2003-00300-7
Superconductivity in the doped “pseudo-ladder” compound CaCu2O3
1
Joint Institute for Nuclear
Research, 141980 Dubna, Russia,
2
Max-Planck-Institut für
Physik Komplexer Systeme, Dresden, Germany
3
Leibniz-Institut
für Festkörper- und Werkstoffforschung Dresden, PO Box
270116, 01171 Dresden, Germany
Corresponding author: a plakida@thsun1.jinr.ru
Received:
2
April
2003
Revised:
29
August
2003
Published online:
24
October
2003
An effective anisotropic t-J model for the “pseudo-ladder" compound CaCu2O3 is proposed based on recent experimental studies and band structure calculations. Superconducting pairing mediated by the exchange interaction in the model is investigated as a function of doping away from the antiferromagnetic insulating state. It is shown that strong anisotropy in the electronic spectrum suppresses superconducting temperature in comparison with conventional copper-oxide superconductors with square lattices.
PACS: 74.20.-z – Theories and models of superconducting state / 74.20.Mn – Nonconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, Luttinger liquid, etc.) / 74.72.-h – Cuprate superconductors (high-Tc and insulating parent compounds)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003
