Universal scaling relations in molecular superconductors

TL;DR

This paper identifies universal scaling relations among key superconducting properties in molecular superconductors, revealing new constraints that differ from cuprates and span a wide range of transition temperatures.

Contribution

It uncovers novel scaling relations in molecular superconductors that challenge existing theories and are consistent across diverse materials.

Findings

Scaling relations hold across two orders of magnitude in $T_c$.

Relations differ significantly from cuprate superconductors.

Constraints imposed on theoretical models of molecular superconductivity.

Abstract

Scaling relations between the superconducting transition temperature $T_{\rm c}$, the superfluid stiffness $\rho_{\rm s}$ and the normal state conductivity $\sigma_0(T_{\rm c})$ are identified within the class of molecular superconductors. These new scaling properties hold as $T_{\rm c}$ varies over two orders of magnitude for materials with differing dimensionality and contrasting molecular structure, and are dramatically different from the equivalent scaling properties observed within the family of cuprate superconductors. These scaling relations place strong constraints on theories for molecular superconductivity.