Dimensionality of Superconductivity in Graphite Lamellar Compounds

Abstract

The occurrence of superconductivity in some of the alkali-metal-graphite lamellar compounds, and its absence in others, has been used as evidence against the existence of two-dimensional superconductivity. In this paper we explain the different superconducting transitions of these compounds in terms of the different carrier populations in the planes and show that no conclusion can be reached about two-dimensional superconductivity.