Paul Kent -> Publications-> One publication

Microstructure and a nucleation mechanism for nanoprecipitates in PbTe-AgSbTe2

X. Ke, C. Chen, J. Yang, L. Wu, J. Zhou, Y. Zhu, P. R. C. Kent

Phys. Rev. Lett. 103 145502 (2009)

Many recent advances in thermoelectric (TE) materials are attributed to their nanoscale constituents. Determination of the nanocomposite structures has represented a major experimental and computational challenge and eluded previous attempts. Here we present the first atomically resolved structures of high performance TE material PbTe-AgSbTe2 by transmission electron microscopy imaging and density functional theory calculations. The results establish an accurate structural characterization for PbTe-AgSbTe2 and identify the interplay of electric dipolar interactions and strain fields as the driving mechanism for nanoprecipitate nucleation and aggregation.

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