Ab initio electronic and geometrical structures of   tripotassium-intercalated phenanthrene
  The geometrical and electronic structure of tripotassium doped phenanthrene, \ce{K3C14H10}, have been studied by first-principles density functional theory. The main effect of potassium doping is to inject charge in the narrow phenanthrene conduction band, rendering the system metallic. The Fermi surface for the experimental X-rays unit cell is composed of two sheets with marked one and two dimensional character respectively. 
P.L. de Andres, A. Guijarro, J.A. Verges
cond-mat.mtrl-sci cond-mat.supr-con