Fig. 4: Temperature–pressure phase diagrams in FeSe1−xTex.
Pressure dependence of Tc, Ts, and Tm indicated by red, blue, and green circles, respectively, for x(Te) ≈ 0.04 (a), 0.06 (b), 0.10 (c), 0.14 (d), 0.18 (e), 0.21 (f), 0.38 (g), and 0.50 (h). The color shades for the nematic, spin density wave (SDW), and superconducting (SC) states are the guides to the eyes. The error of pressure for P < 2 GPa is relatively large (see error bars for 1 GPa) compared to higher pressures. The errors of Ts are estimated from the least squares fit in Fig. 2a. i Three-dimensional electronic phase diagram, temperature versus pressure and Te concentration x(Te), of FeSe1−xTex, combined with the reported T–P–x(S) phase diagram of FeSe1−xSx (0 ≤ x(S) ≲ 0.17)22. The surface plot shows Tc and the purple and white circles represent Ts and Tm, respectively. The red circles represent Tm of FeSe. The gray and purple shadowed areas indicate the magnetic and nematic phases, respectively.
