Physics – Condensed Matter – Materials Science
Scientific paper
2004-12-14
Physics
Condensed Matter
Materials Science
4 pages, 3 figures
Scientific paper
10.1103/PhysRevB.72.060101
We report a novel high pressure structural sequence for the functionally graded thermoelectric, narrow band gap semiconductor AgSbTe$_{2}$, using angle dispersive x-ray diffraction in a diamond anvil cell with synchrotron radiation at room temperature. The compound undergoes a B1 to B2 transition; the transition proceeds through an intermediate amorphous phase found between 17-26 GPa that is quenchable down to ambient conditions. The pressure induced structural transition observed in this compound is the first of its type reported in this ternary cubic family, and it is new for the B1-B2 transition pathway reported to date. Density Functional Theory (DFT) calculations performed for the B1 and B2 phases are in good agreement with the experimental results.
Chen Chenfeng
Cornelius Andrew L.
Kim Eunja
Kumar Ravhi. S.
Nicol Malcolm F.
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