Signatures of spin-orbital states of ${t_{2g}}^2$ system in the optical conductivity : The case of $R$VO${}_3$ ($R$=Y and La)

Abstract

We investigate signatures of spin and orbital states of $R$VO${}_3$ ($R$=Y and La) in the optical conductivity using density functional theory plus dynamical mean-field theory (DFT+DMFT). From the assignment of multiplet states to optical transitions, DFT+DMFT reproduces experimental temperature dependent evolutions of optical conductivity for both YVO${}_3$ and LaVO${}_3$. We also show that the optical conductivity is a useful quantity to probe the evolution of the orbital state even in the absence of spin order. The result provides a reference to investigate spin and orbital states of ${t_{2g}}^2$ vanadate systems which is an important issue for both fundamental physics on spin and orbital states and applications of vanadates by means of orbital state control.

9 pages, 8 figures

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Cited by in corpus (7)

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• Influence of spin and orbital fluctuations on Mott-Hubbard exciton dynamics in LaVO${}_3$ Thin Films
• Spin-orbit coupling and correlations in three-orbital systems
• Lattice distortion in the spin-orbital entangled state in RVO3 perovskites
• Resonant inelastic x-ray scattering study of doping and temperature dependence of low-energy excitations in La${}_{1-x}$Sr${}_x$VO${}_3$
• $d-p$ model and spin-orbital order in the vanadium perovskites
• Tracking the local order parameter through the Hubbard exciton decoherence time in the Mott-Hubbard insulator LaVO3