Superconductivity on the verge of metal-insulator transition in Cu${}_{1-x}$Zn${}_x$Ir${}_2$S${}_4$ probed by $\mu$SR

K. M. Kojima, M. Miyazaki, M. Hiraishi +6

The thiospinel CuIr${}_2$S${}_4$ undergoes a metal-insulator transition below $\approx$230 K, which is suppressed by substitution of Cu with Zn (Cu${}_{1-x}$Zn${}_x$Ir${}_2$S${}_4$) to induce…