Influence of electron-phonon interaction on the lattice thermal conductivity of Co1-xNixSb3
Influence of electron-phonon interaction on the lattice thermal conductivity of Co1-xNixSb3
复制标题
DOI：
10.1103/physrevb.65.094115
复制
发表时间：
2002
影响因子：
3.7
通讯作者：
Jiong Yang;D. Morelli;G. Meisner;Wei Chen;J. Dyck;C. Uher
中科院分区：
文献类型：
--
作者：
Jiong Yang;D. Morelli;G. Meisner;Wei Chen;J. Dyck;C. Uher
我们研究了一系列n型镍掺杂CoSb3方解石材料中的电子-声子散射效应。样品为Co1-xNixSb3多晶，x=0，0.001，0.003，0.005，0.0075和0.01.对于x≤0.003，随着Ni掺杂量的增加，晶格热导率急剧下降。对于较高的Ni含量，晶格热导率的降低是饱和的。我们的理论分析表明，这种晶格热导率的降低不能仅仅用声子的点缺陷散射来解释。相反，我们可以通过引入电子-声子散射机制来拟合镍掺杂CoSb3的晶格热导率，这表明电子-声子相互作用在降低n型Skutterudite的导热系数中起着重要的作用。
We have investigated the effect of electron-phonon scattering in a series of n-type nickel-doped CoSb 3 skutterudite materials. Samples were polycrystalline of the form Co 1 - x Ni x Sb 3 with x=0, 0.001, 0.003, 0.005, 0.0075, and 0.01. The lattice thermal conductivity decreases dramatically with increasing Ni doping for x ≤0.003. For higher Ni concentration the reduction of the lattice thermal conductivity saturates. Our theoretical analysis indicates that this reduction of the lattice thermal conductivity cannot be explained solely by point-defect scattering of the phonons. Rather, we can fit the lattice thermal conductivity of Ni-doped CoSb 3 by introducing an electron-phonon scattering mechanism, and this demonstrates that the electron-phonon interaction can play an important role in the reduction of the heat conduction in n-type skutterudites.