Towards room-temperature superconductivity in low-dimensional C60 nanoarrays: An ab initio study

Abstract

We propose to raise the critical temperature Tc for superconductivity in doped C60 molecular crystals by increasing the electronic density of states at the Fermi level N(EF) and thus the electron-phonon coupling constant in low-dimensional C60 nanoarrays. We consider both electron and hole dopings and present numerical results for N(EF), which increases with the decreasing bandwidth of the partly filled hu- and t1u-derived frontier bands with the decreasing coordination number of C60. Whereas a significant increase in N(EF) occurs in two-dimensional (2D) arrays of doped C60 intercalated in-between graphene layers, we propose that the highest-Tc values approaching room temperature may occur in bundles of nanotubes filled by one-dimensional (1D) arrays of externally doped C60 or La@C60 or in diluted three-dimensional (3D) crystals where quasi-1D arrangements of C60 form percolation paths.

Source-reported materials — not catalogue approval

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