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Crystal Research and Technology |
Cryst. Res. Technol. 39,
322 (2004) - Abstract -
Phase transformation in the system TlBi(Te1-xSex)2
K. Chrissafis, E. S. Vinga, M. Ozer, K. M. Paraskevopoulos, and E. K. Polychroniadis
Solid State Physics Section, Department of Physics, Aristotle University of Thessaloniki, GR 54124, Thessaloniki, Greece
| Keywords | phase transformation, off-center, DSC, narrow gap, chalcogenides, plasma |
| PACS | 65.40.-b, 64.70.Kb, 81.70.Pg, 77.84.Bw |
| DOI | 10.1002/crat.200310189 |
TlBiTe2 and TlBiSe2 -that are ternary analogs of the IV-VI semiconductors-, although they crystallize in the same space group R-3m, exhibit different behaviour during heating. The observed phase transformation depends on Se content (x) in the system TlBi(Te1-xSex)2 and the transformation disappears by increasing Se content after a certain value (x=0.25). This dependence is examined through the analysis of the DSC non-isothermal measurements and an attempt for the explanation of the observed behaviour is undertaken through the consideration of off - center atoms.
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