The Tc to Beat is 125 K

After a long year the superconductivity community worldwide is confidentat last about the synthesis of stable superconducting materials with critical temperatures even higher than 90 K. There have been a series of reports since this January on the synthesis and studies of three, or perhaps four, new oxide superconductors with critical temperatures above 80 K. These discoveries strengthen the hope that the “revolution,” begun only two years ago by Georg Bednorz and Alex Müller (IBM Zurich Research Laboratory at Rüschlikon, Switzerland) with the discovery of superconductivity up to 30 K in ${\mathrm{La}}_{\text{2−x}}(\mathrm{Ba}{)}_x{\mathrm{CuO}}_{\text{4−y}},$ is still young and may engender many interesting surprises.