Abstract
We explore the effect of pressure on the electronic properties of the ferromagnetic Mott-Hubbard insulator $\mathrm{Y}\mathrm{Ti}{\mathrm{O}}_{3}$. We show that the pressure-induced insulator-metal transition is accompanied by anisotropic structural changes driven by the competition between strongly orbital dependent one-electron hopping and strong, multiorbital electronic correlations in the real crystal structure of $\mathrm{Y}\mathrm{Ti}{\mathrm{O}}_{3}$. Our results are relevant for the general understanding of the intricate and interdependent changes in the orbital and magnetic structure of correlated ferromagnetic insulators showing Mott transitions.
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