Theory of optical spectral weights in Mott insulators with orbital degrees of freedom

Details Theory of optical spectral weights in Mott insulators with orbital degrees of freedom Theory of optical spectral weights in Mott insulators with orbital degrees of freedom

2004-03-18

arxiv.org/abs/cond-mat/0403459v2

Phys. Rev. B 70, 195103 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 3 figures, expanded version

Scientific paper

10.1103/PhysRevB.70.195103

Introducing partial sum rules for the optical multiplet transitions, we outline a unified approach to magnetic and optical properties of strongly correlated transition metal oxides. On the example of LaVO$_3$ we demonstrate how the temperature and polarization dependences of different components of the optical multiplet are determined by the underlying spin and orbital correlations dictated by the low-energy superexchange Hamiltonian. Thereby the optical data provides deep insight into the complex spin-orbital physics and the role played by orbital fluctuations.

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