Influence of point defects on the thermal conductivity in FeSi
Influence of point defects on the thermal conductivity in FeSi
复制标题
点缺陷对 FeSi 热导率的影响
DOI:
10.1103/physrevb.97.195201
复制
发表时间:
2018
影响因子:
3.7
通讯作者:
G. K. H.
中科院分区:
文献类型:
--
作者:
Carrete;Madsen;G. K. H.
The unique transport properties of B20 FeSi have been investigated for decades. The progress in theoretical calculations allows the explanation and prediction of more and more of such properties. In this paper we investigate the lattice thermal conductivity of FeSi. Calculation for pristine FeSi severely overestimates the lattice thermal conductivity compared to experiment. We point out that the defect concentration can be considerably larger than indicated by the Hall coefficient. The defect formation energies are calculated and it is found that a substantial amount of iron vacancies can form at thermal equilibrium. These will lead to an increased phonon scattering. To explain the thermal conductivity of FeSi, we consider phonon-phonon, isotope, and phonon-defect scattering to assess possible scattering mechanisms. The calculated thermal conductivities indicate that phonon-defect scattering is important in order to explain the reported experimental values.
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DOI:
--
发表时间:
1994
期刊:
Physical Review B (Condensed Matter)
影响因子:
--
作者:
Chainani;Yokoya;Morimoto;Takahashi;Yoshii;Kaṣāya
通讯作者:
Kaṣāya
影响因子:
44.1
作者:
Freysoldt, Christoph;Grabowski, Blazej;Van de Walle, Chris G.
通讯作者:
Van de Walle, Chris G.
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
T. Saitoh;A. Sekiyama;T. Mizokawa;A. Fujimori;K. Ito;H. Nakamura;M. Shiga
通讯作者:
M. Shiga
影响因子:
3.2
作者:
Chmielowski, Radoslaw;Pere, Daniel;Dennler, Gilles
通讯作者:
Dennler, Gilles
影响因子:
3.7
作者:
R. Stern;G. K. H. Madsen
通讯作者:
G. K. H. Madsen