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  • Title: Pressure-induced disordered substitution alloy in Sb2Te3.
    Author: Zhao J, Liu H, Ehm L, Chen Z, Sinogeikin S, Zhao Y, Gu G.
    Journal: Inorg Chem; 2011 Nov 21; 50(22):11291-3. PubMed ID: 22007692.
    Abstract:
    A new type of disordered substitution alloy of Sb and Te at above 15.1 GPa was discovered by performing in situ high-pressure angle-dispersive X-ray diffraction experiments on antimony telluride (Sb(2)Te(3)), a topological insulator and thermoelectric material, at room temperature. In this disordered substitution alloy, Sb(2)Te(3) crystallizes into a monoclinic structure with the space group C2/m, which is different from the corresponding high-pressure phase of the similar isostructural compound Bi(2)Te(3). Above 19.8 GPa, Sb(2)Te(3) adopts a body-centered-cubic structure with the disordered atomic array in the crystal lattice. The in situ high-pressure experiments down to about 13 K show that Sb(2)Te(3) undergoes the same phase-transition sequence with increasing pressure at low temperature, with almost the same phase-transition pressures.
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