Fig. 3: Paradigmatic H–T phase diagrams of FeSe1−xSx in longitudinal and transverse magnetic fields. | Nature Communications

Fig. 3: Paradigmatic H–T phase diagrams of FeSe1−xSx in longitudinal and transverse magnetic fields.

From: Expanded quantum vortex liquid regimes in the electron nematic superconductors FeSe1−xSx and FeSe1−xTex

Fig. 3

Hirr(T) (orange circles) and Hc2(T) (green squares) curves extracted from the MR derivatives for a FSS00, b FSS16, and c FSS25 with H∥ab and for e FSS13, f FSS16, and g FSS25 with H∥c. The VL state is shaded green. The Meissner phase at low fields has been omitted for clarity. Error bars for Hirr and Hc2 are estimated from the threshold noise level shown, for example, in Fig. 2. The larger error bars for Hc2 at low T in b are due to the limited field range of our experiment. (For this reason, Hc2 could not be determined below 1.3 K in all samples). Larger error bars for Hc2 at low T in panels e and f are due to the emergence of quantum oscillations as indicated in Supplementary Fig. 2. d, h The ratio Hirr(0)/Hc2(0) deduced at the temperatures indicated for H∥ab and H∥c, respectively. In both panels, the black dashed line is a guide to the eye, while the dark (light) gray backgrounds refer to the nematic (non-nematic) phases. The vertical dotted line spanning panels d and h locates the position of the nematic QCP at x = xc ≈ 0.17. Finally, the error bars in panels d and h are composite errors obtained from the errors in Hirr and Hc2.

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