Evolution of Spin-Orbital-Lattice Coupling in the $R$VO${}_3$ Perovskites

Abstract

We introduce a microscopic model which unravels the physical mechanisms responsible for the observed phase diagram of the $R$VO${}_3$ perovskites. It reveals a nontrivial interplay between superexchange, the orbital-lattice coupling due to the GdFeO${}_3$-like rotations of the VO${}_6$ octahedra, and orthorhombic lattice distortions. We find that the lattice strain affects the onset of the magnetic and orbital order by partial suppression of orbital fluctuations. The present approach provides also a natural explanation of the observed reduction of magnon energies from LaVO${}_3$ to YVO${}_3$.

4 pages, 5 figures

References in corpus (5)

• Orbital Physics in the Perovskite Ti Oxides
• Orbital fluctuations in the different phases of LaVO3 and YVO3
• Neutron diffraction study of YVO3, NdVO3, and TbVO3
• One-dimensional orbital fluctuations and the exotic magnetic properties of YVO${}_3$
• Theory for spin and orbital orderings in high temperature phase in $YV{O}_3$

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