Origin of the non-fermi liquid behavior of SrRuO3.

Motivated by the unusual features observed in the transport properties of the ferromagnetic "bad metal" SrRuO3, we construct a model incorporating essential features of the realistic structure of this nearly cubic material. In particular, we show how the t2g orbital orientation in the perfectly cubic structure determines the peculiar structure of the hybridization matrix, and demonstrate how the local non-Fermi liquid features arise when interactions are switched on. We discuss the effects of the slight deviation from the cubic structure qualitatively. The model provides a consistent explanation of the features observed recently in the optical response of SrRuO3.