Comment on 'Electronic Structure of Superconducting KC_8 and Nonsuperconducting LiC_6 Graphite Intercalation Compounds: Evidence for a Graphene-Sheet-Driven Superconducting State'

摘要

In [1] it is claimed that the charge transfer from the metal to the graphene layers is larger in KC_8 than in LiC_6. This relies on a two-dimensional analysis of photoemission (ARPES) data that, a priori and without experimental verification, totally neglects the electronic band dispersion perpendicular to the graphene planes.