A distinct and more polarizable interfacial layer of MgO is supported by two additional analyses conducted in this work. First, Bader charge analysis (Fig. ) shows a small transfer of electronic density from interfacial oxygen atoms to the inclusion, with a rapid return to bulk charges for subsequent layers. Second, we found significant increases in the mobilities of Mg This structural coupling manifests as a large enhancement of the ionic polarization of nanocomposites relative to MgO bulk. Table shows that the enhancement of relaxed ion permittivity for nanocomposites relative to MgO is generally larger than the enhancement MSD for ions neighboring Ag atoms are denoted with the "int" subscript, and atoms further from the inclusion with the "mat" subscript.