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arXiv 0905.1449cond-mat.supr-con
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金属铜氧化物的电阻率上升理论

Theory of Resistivity Upturns in Metallic Cuprates

W. Chen, Brian M. Andersen, P. J. Hirschfeld

摘要:

我们建议,实验观察到的电阻率在低温下上升的铜酸盐可以解释适当占在一个强相关的金属主机的无序的影响。在使用实空间对角化的哈伯德模型在非均匀的非限制性Hartree-Fock近似处理的直流电导率的计算中,我们发现,相关性诱导周围的杂质磁滴,并引起额外的磁散射,导致电阻率上升。一个赝能隙的状态密度示出,以提高两个无序诱导的磁状态和电阻率上升。

英文摘要:

We propose that the experimentally observed resistivity upturn of cuprates at low temperatures may be explained by properly accounting for the effects of disorder in a strongly correlated metallic host. Within a calculation of the DC conductivity using real-space diagonalization of a Hubbard model treated in an inhomogeneous unrestricted Hartree-Fock approximation, we find that correlations induce magnetic droplets around impurities, and give rise to additional magnetic scattering which causes the resistivity upturn. A pseudogap in the density of states is shown to enhance both the disorder-induced magnetic state and the resistivity upturns.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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