Anomalous electronic transport in dual-nanostructured lead telluride.
Anomalous electronic transport in dual-nanostructured lead telluride.
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DOI：
10.1021/ja2006498
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发表时间：
2011-06
影响因子：
15
通讯作者：
J. He;J. Sootsman;L. Q. Xu;S. Girard;J. Zheng;M. Kanatzidis;V. Dravid
中科院分区：
文献类型：
--
作者：
J. He;J. Sootsman;L. Q. Xu;S. Girard;J. Zheng;M. Kanatzidis;V. Dravid
Pb-和Sb-双纳米结构PbTe系统表现出异常的电子输运行为，其中载流子迁移率随着温度的升高先增大后减小。通过结合原位透射电子显微镜观察和理论计算的基础上的能量过滤的电荷载流子，我们提出了一个合理的机制，电荷传输的基础上相间电位介导的共存Pb和Sb沉淀物之间的相互扩散。这些研究结果承诺新的策略，以提高热电品质因数，通过双和multinanostructuring的可混溶沉淀物。
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.