Spin-selective electronic softening vs. rigidity: distinct stabilisation mechanisms in alkali- and alkaline-earth-doped MgH 2 clusters

Alkali doping transforms the hydrogen sublattice of MgH 2 nanoclusters into a magnetically active network, inducing spin-selective electronic softening and radical-like H 0 species. Alkaline-earth dopants preserve electronic rigidity and spin symmetry.