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

Autor:	I. O. Baklanov, Sergey Ovchinnikov, E. V. Kuz’min, E. G. Goryachev
Rok vydání:	2000
Předmět:	Superconductivity Materials science Condensed matter physics Solid-state physics General Physics and Astronomy Electron Crystal Condensed Matter::Materials Science Ferromagnetism Condensed Matter::Superconductivity Pairing Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Cuprate
Zdroj:	Journal of Experimental and Theoretical Physics. 91:353-360
ISSN:	1090-6509 1063-7761
Popis:	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 for CuO2 layers and for RuO2 layers. A superconducting solution of $$d_{x^2 - y^2 }$$ symmetry was obtained for the 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)-π) orbitals compared with a bulk Sr2RuO4 crystal, which leads to stabilization of the ferromagnetic state in the RuO2 layer.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::febc7f27f0fc360a3d9545e931853430 https://doi.org/10.1134/1.1311995 Zobrazit plný text záznamu Plný text ve formátu PDF