Determining ethylene group disorder levels in $\kappa$-(BEDT-TTF)${}_2$Cu[N(CN)${}_2$]Br

A. U. B. Wolter, R. Feyerherm, E. Dudzik +4

We present a detailed structural investigation of the organic superconductor $\kappa$-(BEDT-TTF)${}_2$Cu[N(CN)${}_2$]Br at temperatures $T$ from 9 to 300 K. Anomalies in the $T$ dependence…