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Comparison of superconductivity in Sr_2RuO_4 and copper oxides | | E. V. Kuz’min
; S. G. Ovchinnikov
; | | Date: |
20 Mar 1999 | | Subject: | Strongly Correlated Electrons; Superconductivity | cond-mat.str-el cond-mat.supr-con | | 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. | | Source: | arXiv, cond-mat/9903314 | | Services: | Forum | Review | PDF | Favorites | |
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