Fig. 4: Microscopic parameters of the EFG relaxation.
a Effective correlation time τc of the EFG fluctuations at the Na+ position as a function of salt concentration c for different temperatures T. b Relative contribution of the slow EFG relaxation mode to τc for different c and T. The contribution was estimated using the stretched exponential fit of the normalized EFG ACFs (Supplementary Note 9). c Variance of the total EFG at the ion position \(\langle {{{{{{{{\bf{V}}}}}}}}}^{2}\rangle={(1+{\gamma }_{{{{{{{{\rm{eff,0}}}}}}}}}^{{\prime} })}^{2}\langle {{{{{{{{\bf{V}}}}}}}}}_{{{{{{{{\rm{ext}}}}}}}}}^{2}\rangle\) as a function of c for different temperatures. The legend in c is the same as in a. d EFG variance, 〈V2〉, evaluated from water molecules and ions located within a different number of solvation shells around the central Na+ ion as a function of c at T = 25 °C. The standard error from multiple independent simulation runs is either explicitly shown or does not exceed the symbol size.
