Superconductivity at 43 K in a single C-C bond linked terphenyl

TL;DR

This paper reports the discovery of superconductivity at 43 K in potassium-doped p-terphenyl, an organic molecule with three phenyl rings linked by single C-C bonds, indicating potential for high-temperature organic superconductors.

Contribution

The study demonstrates that doping p-terphenyl with potassium induces superconductivity at 43 K, surpassing previous organic superconductor temperature limits, and provides detailed superconducting parameters.

Findings

Superconductivity at 43 K in potassium-doped p-terphenyl.

Superconducting parameters such as critical fields and coherence length measured.

Potential for high-temperature superconductivity in chain-linked organic molecules.

Abstract

Organic compounds are promising candidates to exhibit high temperature or room temperature superconductivity. However, the critical temperatures of organic superconductors are bounded to 38 K. By doping potassium into $p$-terphenyl consisting of C and H elements with three phenyl rings connected by single C-C bond in para position, we find that this material can have a superconducting phase with the critical temperature of 43 K. The superconducting parameters such as the critical fields, coherent length, and penetration depth are obtained for this superconductor. These findings open an encouraging window for the search of high temperature superconductors in chain link organic molecules.