Superconductivity of the $S{r}_{2}C{a}_{12}C{u}_{24}{O}_{41}$ spin ladder system: Are the superconducting pairing and the spin-gap formation of the same origin?

Naoki Fujiwara

Pressure-induced superconductivity in a spin-ladder cuprate Sr${}_2$Ca${}_{12}$Cu${}_{24}$O${}_{41}$ has not been studied on a microscopic level so far although the superconductivity was a…