Magnetic moment suppression in Ba3CoRu2O9: hybridization effect

Abstract

An unusual orbital state was recently proposed to explain the magnetic and transport properties of Ba${}_3$CoRu${}_2$O${}_9$ [Phys. Rev. B. {\bf 85}, 041201 (2012)]. We show that this state contradicts to the first Hund's rule and does not realize in the system under consideration because of a too small crystal-field splitting in the $t_{2g}$ shell. A strong suppression of the local magnetic moment in Ba${}_3$CoRu${}_2$O${}_9$ is attributed to a strong hybridization between the Ru 4$d$ and O 2$p$ states.

5 pages, 5 figures

References in corpus (4)

• Ferromagnetism in the Mott insulator Ba2NaOsO6
• Crystal-field splitting for low symmetry systems in ab initio calculations
• Unconventional magnetism as a consequence of the charge disproportionation and the molecular orbital formation in Ba4Ru3O10
• Orbitally driven spin-singlet dimerization in $S$=1 La${}_4$Ru${}_2$O${}_{10}$

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