Possible unconventional superconductivity in Na${}_x$CoO${}_2$yH${}_2$O probed by $\mu$SR

Wataru Higemoto, Kazuki Ohishi, Akihiro Koda +6

The superconducting property of recently discovered sodium cobalt oxyhydrate, Na${}_{0.35}$CoO${}_2$1.3H${}_2$O ($T_c=4.5$ K), has been studied by means of muon spin rotation/relaxation…