We present {\it ab initio} density-functional calculations of molecular
solids formed from C28β-derived closed-shell fullerenes. Solid
C28βH4β is found to bind weakly and exhibits many of the electronic
structure features of solid C60β with an enhanced electron-phonon
interaction potential. We show that chemical doping of this structure is
feasible, albeit more restrictive than its C60β counterpart, with an
estimated superconducting transition temperature exceeding those of the
alkali-doped C60β solids.Comment: Lower quality postscript file for Figure 1 is used in the manuscript
in order to meet submission quota for pre-print server. Higher quality
postscript file available from author: [email protected] This article has
been updated to reflect changes incorporated during the peer review process.
It is published in PRB 70, 140504(R) 200