a Kawasugi and colleagues focussed on the well-known organic superconductor ??-(BEDT-TTF)2Cu[N(CN)2]Br?????-Br in short???that has a 2.93% thermal contraction when cooled from room temperature (~300 K) to 20 K. At room temperature, the material is an insulator, but when cooled it becomes a metal at approximately 50 K, and eventually a superconductor at 11 K.The researchers examined the ??-Br film