Heat transport as a probe of electron scattering by spin fluctuations: the case of antiferromagnetic CeRhIn(5).
Heat transport as a probe of electron scattering by spin fluctuations: the case of antiferromagnetic CeRhIn(5).
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热传输作为自旋波动电子散射的探针：反铁磁 CeRhIn(5) 的情况。
DOI：
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发表时间：
2004
影响因子：
8.6
通讯作者：
P. Canfield
中科院分区：
文献类型：
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作者：
J. Paglione;M. Tanatar;D. Hawthorn;R. W. Hill;F. Ronning;M. Sutherland;L. Taillefer;C. Petrovic;P. Canfield
在重费米子金属 CeRhIn(5)（一种 T(N)=3.8 K 的反铁磁体）中测量了热传导和电荷传导。发现热阻率与磁熵成正比，表明自旋涨落在散射电子方面与在扰乱局部矩方面一样有效。电阻率由 q(2) 波动权重控制，随温度单调增加。相比之下，以 omega(2) 权重为特征的热阻和电阻率之间的差异在 T(N) 处急剧达到峰值，并最终在温度 T(*) 大约 = 8 K 时变为零。因此，T(*) 成为磁波动特征能量的度量。
Heat and charge conduction were measured in the heavy-fermion metal CeRhIn(5), an antiferromagnet with T(N)=3.8 K. The thermal resistivity is found to be proportional to the magnetic entropy, revealing that spin fluctuations are as effective in scattering electrons as they are in disordering local moments. The electrical resistivity, governed by a q(2) weighting of fluctuations, increases monotonically with temperature. In contrast, the difference between thermal and electrical resistivities, characterized by a omega(2) weighting, peaks sharply at T(N) and eventually goes to zero at a temperature T(*) approximately = 8 K. T(*) thus emerges as a measure of the characteristic energy of magnetic fluctuations.