1208.1621 (S. V. Streltsov et al.)

Unconventional magnetism as a consequence of the charge
disproportionation and the molecular orbital formation in Ba4Ru3O10    [PDF]

S. V. Streltsov, D. I. Khomskii

The magnetic and electronic properties of Ba$_4$Ru$_3$O$_{10}$ were investigated by the ab-initio and model calculations. It is shown that nonmagnetic ground state of the one-third Ru$^{4+}$ ions is not due to the correlation effects. It is rather caused by the charge disproportionation between crystallographically different Ru and the molecular orbital formation in the Ru's trimer.

View original: http://arxiv.org/abs/1208.1621