Superconductivity in a layered cobalt oxyhydrate Na${}_{0.31}$CoO${}_2\cdot$1.3H${}_2$O

Guanghan Cao, Chunmu Feng, Yi Xu +4

We report the electrical, magnetic and thermal measurements on a layered cobalt oxyhydrate Na${}_{0.31}$CoO${}_2\cdot$1.3H${}_2$O. Bulk superconductivity at 4.3 K has been confirmed,…