Theory for spin and orbital orderings in high-temperature phases in YVO3

Article

关键词: TRANSITION-METAL OXIDES;    MAGNETIC-PROPERTIES;    INSULATING V2O3;    MOTT-INSULATOR;    LAVO3;    SUSCEPTIBILITY;    EXCHANGE;    BEHAVIOR;   

DOI  :  10.1103/PhysRevB.68.184402

来源: SCIE

【 摘 要 】

Motivated by the recent neutron-diffraction experiment on YVO3, we consider a microscopic model where each V3+ ion is occupied by two 3d electrons of parallel spins with twofold-degenerate orbital configurations. The mean-field classical solutions of the spin-orbital superexchange model predicts an antiferro-orbital ordering at a higher temperature followed by a C-type antiferromagnetic spin ordering at a lower temperature. Our results are qualitatively consistent with the observed orbital phase transition at similar to200 K and the spin phase transition at similar to114 K in YVO3.

【 授权许可】

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