Microscopic model of the coexistence of superconductivity and ferromagnetism in the hybrid ruthenate-cuprate oxide RuSr2GdCu2O8

Описание

Тип публикации: статья из журнала

Год издания: 2000

Идентификатор DOI: 10.1134/1.1311995

Аннотация: A microscopic t-J-I model with competing antiferromagnetic (J) and ferromagnetic (I) exchange interactions is proposed for strongly correlated electrons in RuSr2GdCu2O8 . It is assumed that J much greater than I for CuO2 layers and J much less than I for RuO2 layers. A superconducting solution of d(x2-y2) symmetry was obtained for Показать полностьюthe CuO2 layers while competition between ferromagnetism and p-type triplet superconducting pairing is obtained for RuO2 layers. It is shown that the RuO2 layers have a lower carrier concentration in the Hubbard subband formed by coupled ((d(xy)-p)-pi) orbitals compared with a bulk Sr2RuO4 crystal, which leads to stabilization of the ferromagnetic state in the RuO2 layer. (C) 2000 MAIK "Nauka/Interperiodica".

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Издание

Журнал: Journal of Experimental and Theoretical Physics

Выпуск журнала: Vol. 91, Is. 2

Номера страниц: 353-360

ISSN журнала: 10637761

Место издания: New York

Издатель: Maik Nauka/Interperiodica/Springer

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