%0 Journal Article
%A Zhang, Xue-Jing
%A Koch, Erik
%A Pavarini, Eva
%T LaVO_3 : A true Kugel-Khomskii system
%J Physical review / B
%V 106
%N 11
%@ 1098-0121
%C Woodbury, NY
%I Inst.
%M FZJ-2022-03990
%P 115110
%D 2022
%Z ISSN 2469-9969 not unique: **2 hits**.
%X We show that the t^2_2g perovskite LaVO_3, in its orthorhombic phase, is a rare case of a system hosting an orbital-ordering Kugel’-Khomskii phase transition rather than being controlled by the Coulomb-enhanced crystal-field splitting. We find that, as a consequence of this, the magnetic transition is close to (and even above) the superexchange driven orbital-ordering transition, whereas typically magnetism arises at much lower temperatures than orbital ordering. Our results support the experimental scenario of orbital ordering and G-type spin correlations just above the monoclinic-to-orthorhombic structural change. To explore the effects of crystal-field splitting and filling, we compare to YVO_3 and t^1_2g titanates. In all these materials the crystal field is sufficiently large to suppress the Kugel’-Khomskii phase transition.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000859707800004
%R 10.1103/PhysRevB.106.115110
%U https://juser.fz-juelich.de/record/910612