Comparison of superconductivity in Sr2RuO4 and copper oxides

E. V. Kuz’min; S. G. Ovchinnikov; I. O. Baklanov

doi:10.1103/PhysRevB.61.15392

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Comparison of superconductivity in Sr2RuO4 and copper oxides

E. V. Kuz’min, S. G. Ovchinnikov, I. O. Baklanov

DOI 10.1103/PhysRevB.61.15392 · Physical Review B

T1

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Abstract

To compare the superconductivity in strongly correlated electron systems with the antiferromagnetic fluctuations in the copper oxides and with the ferromagnetic fluctuations in Sr2RuO4 a t−J−I model is proposed. The antiferromagnetic coupling J results in the superconducting state of dx2−y2 symmetry and the ferromagnetic coupling I results in the spin-triplet p-type state. The difference in the gap anisotropies provides the large difference in Tc values, for the typical values of the coupling constants: Tc∼1 K for the ruthenate and Tc∼100 K for the cuprates.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1	Pressure not reported	unknown
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown