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| Naji, M. |
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| Ertürk, Emre |
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| Azevedo, Nuno Monteiro |
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Doroshenko, A. N.
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Publications (5/5 displayed)
- 2021Percolation effects and self-organization processes in cold-pressed Bi2(Te1−xSex)3 solid solutionscitations
- 2020Transport properties of the bismuth telluride thin films with different stoichiometry in the temperature range 77-300 Kcitations
- 2020Percolation transition and physical properties of Bi1-xSbx solid solutions at low Bi concentrationcitations
- 2019Effect of Deviation from Stoichiometry on Thermoelectric Properties of Bi₂Te₃ Polycrystals and Thin Films in the Temperature Range 77-300 Kcitations
- 2019Percolation effects and self-organization processes in Bi₂(Te₁₋ₓSeₓ)₃ solid solutionscitations
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article
Percolation effects and self-organization processes in Bi₂(Te₁₋ₓSeₓ)₃ solid solutions
Abstract
The room-temperature dependences of microhardness H, electrical conductivity σ, the Seebeck coefficient S, and thermoelectric power factor P on composition of Bi₂(Te₁₋ₓSeₓ)₃ solid solutions were measured in the concentration range x = 0 - 0.07. In the intervals x = 0.0075 - 0.0175 and x = 0.025 - 0.035, an anomalous decrease in H and S and increase in σ with increasing x were observed. The first concentration-dependent anomaly was attributed to critical phenomena, accompanying a percolation-type phase transition. The percolation threshold xc and the radius of deformation spheres R₀ around Se impurity atoms were estimated. The second anomaly is assumed to be connected with a short-range ordering in the solid solution. The non-monotonic character of the dependences of H on the load on an indenter, whose behavior depended on the impurity concentration, was attributed to the interaction of the deformation fields created by dislocations and impurity atoms.