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arXiv 1012.2764cond-mat.str-elcond-mat.quant-gascond-mat.supr-con
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高$Tc$铜酸盐单粒子散射率的自洽计算

Self-consistent calculation of the single particle scattering rate in high $Tc$ cuprates

Abolhassan Vaezi

摘要:

在铜氧化物高温超导领域,最佳掺杂以上电阻率的线性温度依赖性是一个长期存在的问题。本文用从玻色子方法研究了规范涨落对动量弛豫时间和输运散射率的影响。我们使用一个更一般的奴隶处理,以解决分解海森堡交换项的歧义。我们的结论是,这一项应该只在库珀通道分解。这导致自旋子质量与掺杂成反比。它表明,求解方程的输运散射率自洽,我们找到了一个交叉温度以上,我们得到的电阻率以及单粒子散射率的线性温度依赖性。它还表明,这种线性的温度依赖性的赝隙区域中的散射率解释了存在的费米弧的长度随温度线性变化。

英文摘要:

The linear temperature dependence of the resistivity above the optimal doping is a longstanding problem in the field of high temperature superconductivity in cuprates. In this paper, we investigate the effect of gauge fluctuations on the momentum relaxation time and the transport scattering rate within the slave boson method. We use a more general slave treatment to resolve the ambiguity of decomposing the Heisenberg exchange term. We conclude that this term should be decomposed only in the Cooper channel. This results in the spinon mass inversely proportional to the doping. It is showed that solving the equation for the transport scattering rate self-consistently, we find a crossover temperature above which we obtain the linear temperature dependence of the electrical resistivity as well as the single particle scattering rate. It is also shown that this linear temperature dependence of the scattering rate in the pseudogap region explains the existence of the Fermi arcs with a length that linearly varies with temperature.

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