  This study uses advanced numerical methods to estimate the mean force
potential (PMF) between charged, polarizable colloidal particles in dense
electrolytes. We observe that when the Debye screening length,
$\lambda_{\mathrm{D}}$, is below the hydrated ion size, the PMF shows
discernible oscillations, contrasting with the expected decay in DLVO theory.
Our findings provide evidence for the existence of anomalous underscreening in
electrostatically stabilized suspensions, potentially having significant
implications for our understanding of colloidal stability and the forces that
govern the behavior of concentrated charged soft matter systems beyond DLVO
theory.
