The electronic structure of quasi-low-dimensional solids is a topic of enduring interest due to the complex many-body interactions that exist in such materials and their resulting exotic physical properties. A well studied class of such materials is the quasi-low-dimensional metals known collectively as molybdenum oxide bronzes. These materials are all derived from the band insulator $\alpha {\text{-MoO}}_3$. We report here a study of the electronic structure of $\alpha {\text{-MoO}}_3$ using resonant inelastic x-ray scattering and soft x-ray emission spectroscopy. We observe significant variation in x-ray scattering as a function of the relative orientation of the polarization vector of the incident light and the crystal axes. We interpret our data using a model of $\mathbf{k}$-selective soft x-ray scattering.

• Received 2 June 2008

DOI:https://doi.org/10.1103/PhysRevB.79.035110