Electron-Phonon Interactions in C$_{28}$-derived Molecular Solids

TL;DR

This study uses first-principles calculations to explore the electronic and electron-phonon properties of C$_{28}$-derived molecular solids, revealing potential for higher-temperature superconductivity compared to C$_{60}$.

Contribution

It provides the first detailed ab initio analysis of C$_{28}$-based molecular solids, highlighting their electronic structure and superconducting potential.

Findings

Solid C$_{28}$H$_4$ exhibits electronic features similar to C$_{60}$.

Enhanced electron-phonon interaction potential in C$_{28}$-derived solids.

Feasible chemical doping with potential for higher superconducting transition temperatures.

Abstract

We present {\it ab initio} density-functional calculations of molecular solids formed from C$_{28}$-derived closed-shell fullerenes. Solid C$_{28}$H$_4$ is found to bind weakly and exhibits many of the electronic structure features of solid C$_{60}$ with an enhanced electron-phonon interaction potential. We show that chemical doping of this structure is feasible, albeit more restrictive than its C$_{60}$ counterpart, with an estimated superconducting transition temperature exceeding those of the alkali-doped C$_{60}$ solids.