Comparison of superconductivity in Sr_2RuO_4 and copper oxides
Strongly Correlated Electrons
2009-10-31 v1 Superconductivity
Abstract
To compare the superconductivity in strongly correlated electron systems with the antiferromagnetic fluctuations in the copper oxides and with the ferromagnetic fluctuations in Sr_2RuO_4 a t-J-I model is proposed. The antiferromagnetic coupling J results in the superconducting state of d_{x^2-y^2} symmetry and the ferromagnetic coupling constant I results in the spin-triplet p-type state. The difference in the gap anisotropies provides the large difference in T_c values, for the typical values of the coupling constants: T_c of order of 1K for the ruthenate and T_c of order of 100K for the cuprates.
Keywords
Cite
@article{arxiv.cond-mat/9903314,
title = {Comparison of superconductivity in Sr_2RuO_4 and copper oxides},
author = {E. V. Kuz'min and S. G. Ovchinnikov},
journal= {arXiv preprint arXiv:cond-mat/9903314},
year = {2009}
}
Comments
4 pages, RevTEX, 3 figs. Submitted to Phys. Rev. Lett