https://techcrunch.com/2023/08/02/room-temperature-superconductors/

Hope springs eternal. For decades, there have been claims that researchers have created room-temperature superconductors. The materials promise to conduct an electric current with zero resistance while throwing off powerful magnetic fields. They’re a holy grail of materials science.

Last week, a team from South Korea claimed to have created one — and not just a material that superconducts at ambient temperature, but one that does so at ambient pressure, too. Oh, and it’s made of relatively common materials including lead, phosphorus and copper. The researchers published their findings on a preprint server. While not the gold standard in scientific publishing, it’s a decent first step that allows other experts to vet the claims.