Keywords :
Experimental/ cadmium compounds; electronegativity; II-VI semiconductors; liquid semiconductors; liquid structure; melting; mercury compounds; neutron diffraction; zinc compounds/ local order; neutron scattering; fourfold coordination; semiconductors; sixfold coordination; repulsive potential hardness; entropy; CdTe; HgTe; ZnTe/ A6125 Studies of specific liquid structures A6470D Solid-liquid transitions/ CdTe/bin Cd /bin Te/bin; HgTe/bin Hg /bin Te/bin; ZnTe/bin Te /bin Zn/bin
Abstract :
[en] The structure of liquid CdTe, HgTe and ZnTe is studied by neutron scattering. Upon melting, drastically different behaviors are found: CdTe and ZnTe keep their fourfold coordination in the melt and remain semiconductors, whereas HgTe becomes sixfold coordinated and metallic. This dissimilarity is discussed in terms of the electronegativity difference and of the repulsive potential hardness. Entropic aspects are also discussed
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