A group of scientists affiliated with research institutes in China and Japan have reported finding a sign of superconductivity in a material that was at the centre of a controversy last year over similar claims.
Their study is described in a preprint paper they uploaded to the internet on January 2. (A preprint is a paper the authors have finished writing and is yet to be peer-reviewed.)
While the study has already drawn some attention in the scientific community, the researchers who conducted it and others are proceeding with caution – some rooted in the superconductivity controversies that erupted last year and some in the study itself.
