E. I. Shneider, S. G. Ovchinnikov, A. V. Shnurenko, “Contribution of the non-Heisenberg ring exchange to the magnetic mechanism of high-Tc superconductivity”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2012, Volume 95, Issue 4,Pages <nobr>211

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CONDENSED MATTER

Contribution of the non-Heisenberg ring exchange to the magnetic mechanism of high-Tc superconductivity

E. I. Shneider, S. G. Ovchinnikov, A. V. Shnurenko

L. V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences

Abstract: The effect of non-Heisenberg four-spin ring exchange on the superconducting transition temperature in strongly correlated electron systems is studied. It is shown that the ring exchange can significantly suppress the contribution of the Heisenberg exchange to superconducting pairing.

Received: 13.12.2011