Crossover of Superconductivity across the end point of antiferromagnetic phase in FeSe$_{\rm 1-x}$S$_{\rm x}$ under pressure

Temperature-pressure ($T$-$P$) phase diagrams of FeSe$_{\rm 1-x}$S$_{\rm x}$ were investigated by the measurements of dc magnetization ($M$) and electrical resistivity ($\rho$) under pressure, using single crystal specimens with $x$=0.04, 0.08 and 0.13. We observed a crossover of the superconductivity with increasing $P$ near the end point of antiferromagnetic (AFM) phase, where two superconducting phases coexist within a pressure width of $\Delta$$P$$\sim$1 GPa, having different $T_{\rm c}$s. These results suggest that the superconducting phases inside and outside the AFM phase have different origins.