  We investigate a metallic glass-forming (GF) material (Al90Sm10) exhibiting a
fragile-strong (FS) glass-formation by molecular dynamics simulation to better
understand this highly distinctive pattern of glass-formation in which many of
the usual phenomenological relations describing relaxation times and diffusion
of OGF liquids no longer apply, and where instead genuine thermodynamic
features are observed in response functions and little thermodynamic signature
is exhibited at the glass transition temperature, Tg. Given the many unexpected
similarities between the thermodynamics and dynamics of this metallic GF
material with water, we first focus on the anomalous static scattering in this
liquid, following recent studies on water, silicon and other FS GF liquids. In
particular, we quantify the 'hyperuniformity index' H of our liquid which
provides a quantitative measure of molecular 'jamming'. To gain insight into
the T-dependence and magnitude of H, we also estimated another more familiar
measure of particle localization, the Debye-Waller parameter $<u^2>$ describing
the mean-square particle displacement on a timescale on the order of the fast
relaxation time, and we also calculate H and $<u^2>$ for heated crystalline Cu.
This comparative analysis between H and $<u^2>$ for crystalline and metallic
glass materials allows us to understand the critical value of H on the order of
$10^{-3}$ as being analogous to the Lindemann criterion for both the melting of
crystals and the 'softening' of glasses. We further interpret the emergence of
FS GF and liquid-liquid phase separation in this class of liquids to arise from
a cooperative assembly process in the GF liquid.

Soft Condensed Matter;Materials Science