Scattering-independent anomalous Nernst effect in ferromagnets
Scattering-independent anomalous Nernst effect in ferromagnets
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DOI：
10.1103/physrevb.87.060406
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发表时间：
2013-02-15
影响因子：
3.7
通讯作者：
Mokrousov, Yuriy
中科院分区：
文献类型：
--
作者：
Weischenberg, Juergen;Freimuth, Frank;Mokrousov, Yuriy
利用密度泛函理论中的全势线性化增广平面波方法，我们计算了对帽顶上热电导张量(α)的散射无关部分的所有贡献，即帽顶(Ic)上的本征贡献(α)和帽顶(Sj)上的侧跃贡献(α)。对于铁磁材料bcc-Fe、hcp-Co、fcc-Ni和L1(0)有序合金FEPD和FePT，我们对本征贡献和侧跃贡献的能量和温度依赖关系的研究表明，它们都是同等重要的。总体而言，我们的计算能够正确地再现实验测量信号的量级和符号，这表明与散射无关的部分在铁磁体的反常能斯特效应中起着重要作用。DOI：10.1103/PhysRevB.87.060406
Using the full-potential linearized augmented plane-wave method within the density functional theory, we compute all contributions to the scattering-independent part of the thermoelectric conductivity tensor (alpha) over cap, namely, the intrinsic contribution (alpha) over cap (ic) and the side-jump contribution (alpha) over cap (sj). For the ferromagnetic materials bcc Fe, hcp Co, fcc Ni, and L1(0) ordered alloys FePd and FePt, our investigations of the energy and temperature dependence of the intrinsic and side-jump contributions show that they are both of equal importance. Overall, our calculations are able to correctly reproduce the order of magnitude and sign of the experimentally measured signal, suggesting that the scattering-independent part plays an important role in the anomalous Nernst effect of ferromagnets. DOI: 10.1103/PhysRevB.87.060406