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arXiv · 0805.1545

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

Peter Horsch·Andrzej M. Oles'·Louis Felix Feiner·Giniyat Khaliullin
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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$_3$.

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Peter Horsch, Andrzej M. Oles', Louis Felix Feiner, Giniyat Khaliullin. 2008-05-11. Evolution of Spin-Orbital-Lattice Coupling in the $R$VO$_3$ Perovskites. https://doi.org/10.1103/physrevlett.100.167205

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