Reports
Since the discovery of high-temperature superconductors, several materials have been reported to be room-temperature superconductors, although none of these reports has been confirmed.
In 2012, an Advanced Materials article describes supraconducting behavior of graphite powder after treatment with pure water at temperatures as high as 300 K and above. So far, the authors have not been able to prove vanishing of the material's resistance.
In 2008, an EE Times article claimed that room-temperature superconductivity had been achieved in silane compressed to a solid at high pressure. However, the work described in the article only found a transition temperature of 17 K at 96 and 120 GPa, and the EE Times article was later corrected.
In 2003, a group of researchers published results on high-temperature superconductivity in palladium hydride (PdHx: x>1) and an explanation in 2004. In 2007 the same group published results suggesting a superconducting transition temperature of 260 K. The superconducting critical temperature increases as the density of hydrogen inside the palladium lattice increases. This work has not been corroborated by other groups.
In 2000, while extracting electrons from diamond during his ion implantation work, Johan Prins claimed to have observed a phenomenon that he explained as room temperature superconductivity within a phase formed on the surface of oxygen-doped type IIa diamonds in a 10-6 mbar vacuum. He developed and self-published a theory using a Wigner-type mechanism as opposed to the Cooper pair mechanism to explain the phenomenon. As of 2010, this work had not been corroborated.
Read more about this topic: Room-temperature Superconductor
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