TY  - JOUR
AU  - Zhang, Xue-Jing
AU  - Koch, Erik
AU  - Pavarini, Eva
TI  - LaVO_3 : A true Kugel-Khomskii system
JO  - Physical review / B
VL  - 106
IS  - 11
SN  - 1098-0121
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2022-03990
SP  - 115110
PY  - 2022
N1  - ISSN 2469-9969 not unique: **2 hits**.
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000859707800004
DO  - DOI:10.1103/PhysRevB.106.115110
UR  - https://juser.fz-juelich.de/record/910612
ER  -