Elusive superconducting-transition signature seen for the first time

https://physicsworld.com/a/elusive-superconducting-transition-signature-seen-for-the-first-time/

"electrons in the cuprate material... Bi2212, pair up at around 120 K... ARPES signal inside already-existing energy gap, which opens at near 120 K, shows most rapid drop across 77 K... is exactly the superconducting transition temperature determined by magnetic susceptibility measurements... anomaly at Tc... as the one the researchers observed in the material’s specific heat... pins down second step in transition and fourth signature of bulk superconductivity"