Molecular dynamics study of short and medium range order in modified bgo glasses

In the paper we present our recent Molecular Dynamics (MD) simulations of the structure of bismuth-germanate (BGO) glasses of x[pBi2 (1!p)Bi2O3](1!x)GeO2 composition, where x denotes the content of the bismuth oxide in unmodified glasses, and p – the fraction of neutral bismuth that can appear in the surface modification process (e.g. annealing in hydrogen atmosphere). We consider glasses of compositions x = 0.1, 0.2, 0.3 and reduction degrees p = 0, 0.25, 0.5, 0.75, 1. The simulation results are analysed in detail and compared with the structural data provided by other authors.