Thermoelectric power of concentrated Kondo systems.
Thermoelectric power of concentrated Kondo systems.
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集中近藤系统的热电。
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
B. R. Coles
中科院分区：
文献类型：
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作者：
V. Zlatić;T. Costi;A. Hewson;B. R. Coles
采用具有多个散射通道的单杂质Anderson模型，讨论了掺杂Al、Ag、Au、Ga等非磁性杂质的Ce-Cu、Ce-B、Yb-Cu金属间化合物系浓缩Kondo系统的热功率。共振散射和非共振散射之间的干涉对于将理论与实验数据联系起来是很重要的。在共振通道中存在关联效应，并用数值重整化群方法对其进行了解释。热电势对自由电子值的大幅增强反映了基元激发的特征能级从费米能e F到Kondo能T K的重整化
The thermopower of concentrated Kondo systems based on Ce-Cu, Ce-B, and Yb-Cu intermetallic compounds doped with nonmagnetic impurities like Al, Ag, Au, and Ga, is discussed using the single impurity Anderson model with more than one scattering channel. Interference between the resonant and nonresonant scattering is important for relating the theory to the experimental data. Correlation effects are present in the resonant channel and are accounted for by a numerical renormalization- group method. The large enhancement of the thermopower over the free-electron values reflects the renormalization of the characteristic energy scale of the elementary excitations from the Fermi energy, e F , to the Kondo energy, T K