Bulk superconductivity at 120 K in the Tl–Ca/Ba–Cu–O system

@article{Sheng1988BulkSA,
  title={Bulk superconductivity at 120 K in the Tl–Ca/Ba–Cu–O system},
  author={Zhengzhi Sheng and Allen M. Hermann},
  journal={Nature},
  year={1988},
  volume={332},
  pages={138-139}
}
The discovery of 30-K superconductivity in the La–Ba–Cu–O system1 and 90-K superconductivity in the Y–Ba–Cu–O system2 stimulated a worldwide search for even higher-temperature superconductors. Unfortunately, most of the higher-temperature transitions reported in the past year have proved to be unstable, irreproducible, or not due to bulk superconductivity3–7. Recently, we and co-workers8,9 reported superconductivity above 90 K in a new Tl–Ba–Cu–O system, and pointed out that elemental… 
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