Fig. 2. Time-reversal symmetry-breaking charge order and superconductivity in (K,Rb)V₃Sb₅ under pressure.

a The pressure dependences of the transition temperatures $T_{\mathrm{1}}^{*}$ and $T_{\mathrm{2}}^{*}$. Temperature dependence of the absolute change of the electronic relaxation rate ΔΓ = Γ(T) − Γ(T > T_c) for KV₃Sb₅ (b) and RbV₃Sb₅ (c) in the temperature range across T_c, measured at ambient pressure and above the critical pressure at which T_c is maximum. The error bars represent the standard deviation of the fit parameters.