Journal
PHYSICAL REVIEW B
Volume 73, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.73.054203
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The structure of liquid CdTe was investigated at pressures up to 23.5 GPa using synchrotron x-ray diffraction. The structure factor, S(Q), and the pair distribution function, g(r), drastically change in two pressure regions, 1.8-3.0 and 7.0-9.0 GPa, accompanied with marked increase in the average coordination number. These findings suggest that there exists at least three stable liquid forms below 23.5 GPa. The pressure interval of the structural change is much smaller compared to other liquids of tetrahedrally bonded materials. Comparing the shapes of S(Q) and g(r) and other structural parameters with the respective data for the reference materials reveals that the lowest- and intermediate-pressure forms have the same local structures as the crystalline counterpart (zinc-blende-like local structure and a NaCl-like local structure), while the highest-pressure form has a different local structure from that in the crystalline form.
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