Destruction of the small Fermi surfaces in Na${}_x$CoO${}_2$ by Na disorder

Abstract

We show using density functional calculations that the small $e_g^{\prime }$ Fermi surfaces in Na${}_x$CoO${}_2$ are destroyed by Na disorder. This provides a means to resolve the prediction of these sections in band structure calculations with their non-observation in angle resolved photoemission experiments.

4 pages, 2 figs