First-principles study on lattice thermal conductivity of thermoelectrics HgTe in different phases
First-principles study on lattice thermal conductivity of thermoelectrics HgTe in different phases
复制标题
不同相热电材料HgTe晶格热导率的第一性原理研究
DOI:
10.1063/1.4922978
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发表时间:
2015-06
影响因子:
3.2
通讯作者:
Ming Hu
中科院分区:
文献类型:
--
作者:
Tao Ouyang;Ming Hu
Accurate description of thermal conductivity of high pressure phase of materials is a key for predicting the thermoelectric performance. In this paper, by combining first-principle calculation and phonon Boltzmann transport equation, we investigate the lattice thermal conductivity of HgTe in low pressure zinc blende and high pressure cinnabar phases. The results show that the phononic thermal conductivity of high pressure cinnabar phase HgTe is more than an order of magnitude lower than that for the low pressure zinc blende phase. This is mainly originated from the suppressed group velocity and reduced phonon relaxation time due to the nature of mixed phonon branches in the cinnabar phase of HgTe. Based on the new and precise value of the lattice thermal conductivity calculated in this work, the figure of merit of HgTe is re-calculated and the maximum figure of merit is found to approach 1.4 at room temperature. Our first principles study highlights the high pressure HgTe phase as a very promising candida...
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DOI:
10.1002/pssa.2210770272
发表时间:
1983-06
期刊:
Physica Status Solidi (a)
影响因子:
--
作者:
T. Huang;A. Ruoff
通讯作者:
T. Huang;A. Ruoff
影响因子:
3.7
作者:
Kresse, G;Furthmuller, J
通讯作者:
Furthmuller, J
影响因子:
10.8
作者:
Hu, Ming;Giapis, Konstantinos P.;Poulikakos, Dimos
通讯作者:
Poulikakos, Dimos
影响因子:
3.7
作者:
S. Radescu;A. Mujica;R. Needs
通讯作者:
S. Radescu;A. Mujica;R. Needs
DOI:
--
发表时间:
2008-03
期刊:
Bulletin of the American Physical Society
影响因子:
--
作者:
A. Hochbaum;Renkun Chen;R. Delgado;W. Liang;E. Garnett;M. Najarian;A. Majumdar;P. Yang
通讯作者:
A. Hochbaum;Renkun Chen;R. Delgado;W. Liang;E. Garnett;M. Najarian;A. Majumdar;P. Yang