Fig. 6: The obtained phase diagram of CsV₃Sb₅.

The black square is the CDW transition temperature T_CDW determined by the temperature dependence of Sb2-NQR spectral intensity (see Supplementary Fig. 4). The blue circle is the superconducting transition temperature T_c × 4 obtained in this work. The blue triangle is T_c × 4 taken from previous transport measurements^31,32. The red triangle is the obtained ^121/123θ from the Curie–Weiss fitting in Fig. 5. For P = 2.43 GPa, δν has a very weak temperature dependence, which leads to a large error bar ~ 100 K from the Curie–Weiss fitting. So we did not plot ^121/123θ at P = 2.43 GPa in the phase diagram. Colors in the normal state represent the evolution of the 1/T₁T of ¹²³Sb2. Solid and dashed lines are guides to the eye. The error bar for T_CDW represents the temperature interval in measuring the NQR spectra (see Supplementary Fig. 4).