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arXiv 1108.3872cond-mat.str-el
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Kondo晶格中的关联无序

Correlated disorder in Kondo lattice

Maxim Dzero, Xinyi Huang

摘要:

受最近无序重费米子材料实验的启发,我们研究了近藤晶格中的关联无序效应。杂质之间的相关性被认为是在两个粒子的水平。我们使用平均场论近似的安德森晶格模型来计算如何出现在近藤晶格的相干杂质之间的相关性的影响。我们发现,在无序抑制相干温度的速率依赖于杂质相关的长度。随着杂质浓度的增加,我们通常发现相干温度的抑制显著降低。结果进行了讨论的背景下,现有的实验数据。

英文摘要:

Motivated by recent experiments on disordered heavy-fermion materials, we study the effect of correlated disorder in Kondo lattice. Correlations between the impurities are considered at the two-particle level. We use mean-field theory approximation for the Anderson lattice model to calculate how the emergence of coherence in the Kondo lattice is impacted by correlations between impurities. We show that the rate at which disorder suppresses coherence temperature depends on the length of impurity correlations. As impurity concentration increases, we generally find that the suppression of coherence temperature is significantly reduced. The results are discussed in the context of available experimental data.

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