BCS theory of superconductivity in a pseudofullerene system: The case of the isohexaiminocryptand molecular solid

We examine the theoretical possibility of superconductivity in molecular crystals of the isohexaiminocryptand (IHIC), a molecule which has some properties in common with C-60. Using the standard BCS theory with electron-phonon coupling we compare the predictions for the critical temperature T-c, in the two cases; Our calculation shows that IHIC is likely to give rise to a larger value of T-c. The origin of this difference is discussed together with possible extensions. A comparison is made with some recent experimental data which show some evidence for a T-c of order 50 K in this material.