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| Home > Publications database > Comparative high-pressure structural and electrical transport properties study of thermoelectric (Bi$_{1-x}$Sb$_x$)$_2$Te$_3$ compounds |
| Journal Article | PUBDB-2025-03794 |
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2025
Springer International Publishing
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Please use a persistent id in citations: doi:10.1007/s43939-025-00309-4 doi:10.3204/PUBDB-2025-03794
Abstract: Thermoelectric (Bi$_{1-x}$Sb$_x$)$_2$Te$_3$ (BST-x) compounds, with x=0.2, 0.7 and 0.9, have beenstudied using synchrotron angle-dispersive powder x-ray diffraction in a diamondanvil cell up to 25 GPa (at room temperature). The results clearly indicate thatall compounds of this study follow a similar structural evolution like the one ofpure Bi$_2$Te$_3$ and Sb$_2$Te$_3$ under pressure. From the comparison between the criticalpressures of the corresponding phase transitions, a clear trend of increasing criticalpressure for the transition to the disordered solid-solution BCC phase was observedwith the increase of Sb concentration. In the case of the BST-0.7, an extendedstability of the solid-solution BCC phase up to, at least, 180 GPa was observed. Finally,electrical transport properties measurements under pressure for BST-0.7, document areversible pressure-induced metallization above 12 GPa.
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