A new organic superconductor, possibly with formula K3 p-terphenyl, has been discovered by Wang, Gao, Huang and Chen, reaching a very high Tc of about 120~K. Besides a clear diamagnetic signal, most other details such as stoichiometry and structure are yet unknown. However, pristine p-terphenyl has a familiar P21/a staggered bimolecular structure, and it can be reasonably assumed that a similar bimolecular structure could be retained by hypothetical K3 p-terphenyl. We point out that the resulting 2-narrow band metal would support the same s± superconductivity recently proposed for doped polycyclic aromatic hydrocarbons such as La-phenanthrene or K3-picene. In that model, narrow bands, a large Hubbard U and the neighbourhood of a Mott transition enhance superconductivity rather than damaging it.
@article{arxiv.1705.05066,
title = {Two-Band $s_\pm$ Strongly Correlated Superconductivity in K$_3$ p-Terphenyl?},
author = {Michele Fabrizio and Tao Qin and S. Shahab Naghavi and Erio Tosatti},
journal= {arXiv preprint arXiv:1705.05066},
year = {2017}
}