Thermopower enhancement in PbTe with pb precipitates

被引：320

作者：

Heremans, JP ^{[1
]}

Thrush, CM ^{[1
]}

Morelli, DT ^{[1
]}

机构：

[1] Delphi Res Labs, Shelby Township, MI 48315 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2005年 / 98卷 / 06期

关键词：

D O I：

10.1063/1.2037209

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The thermoelectric power of polycrystalline PbTe samples containing nanometer-sized precipitates of Pb metal is enhanced over that of bulk PbTe. Samples of PbTe containing excess Pb and Ag were prepared using conventional metallurgical heat treatments. These samples are shown, by x-ray diffraction, by microscopy, and by the presence of a superconductive transition, to contain Pb precipitates with sizes on the order of 30-40 nm. The thermopower enhancement is related to an increase in the energy dependence of the relaxation time, as evidenced by a complete set of measurements of thermoelectric and thermomagnetic transport coefficients. (c) 2005 American Institute of Physics.

引用

页数：6

共 22 条

[11] EXISTENCE OF SUPERCONDUCTING STATE IN SEMICONDUCTING PBTE COMPOUNDS [J].