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

Abstract

We show using density functional calculations that the small $e_g'$ 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