Anomalous Electronic Transport in Dual-Nanostructured Lead Telluride

被引：44

作者：

He, J. Q. ^{[1
,2
]}

Sootsman, J. R. ^{[2
]}

Xu, L. Q. ^{[3
,4
]}

Girard, S. N. ^{[2
]}

Zheng, J. C. ^{[3
,4
]}

Kanatzidis, M. G. ^{[2
]}

Dravid, V. P. ^{[1
]}

机构：

[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[2] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

[3] Xiamen Univ, Dept Phys, Inst Theoret Phys & Astrophys, Xiamen 361005, Peoples R China

[4] Xiamen Univ, Fujian Prov Key Lab Theoret & Computat Chem, Xiamen 361005, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 23期

关键词：

THERMAL-CONDUCTIVITY; PBTE; THERMOELECTRICS; SCATTERING;

D O I：

10.1021/ja2006498

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The Pb- and Sb-dual nanostructured PbTe system exhibits anomalous electronic transport behavior wherein the carrier mobility first increases and then decreases with increase in temperature. By combining in situ transmission electron microscopy observations and theoretical calculations based on energy filtering of charge carriers, we propose a plausible mechanism of charge transport based on interphase potential that is mediated by interdiffusion between coexisting Pb and Sb precipitates. These findings promise new strategies to enhance thermoelectric figure of merit via dual and multinanostructuring of miscible precipitates.

引用

页码：8786 / 8789

页数：4

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