2017/05/15 by Michele Fabrizio, Tao Qin, Fabrizio, Michele +5
Chemistry · Physics and Astronomy · #Advanced Chemical Physics Studies #Advanced Physical and Chemical Molecular Interactions #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.1705.05066
openalex publication_date 2017/05/15 · openalex created_date 2017/05/26 · openalex updated_date 2026/07/28
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.