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arXiv 1108.4375cond-mat.supr-con
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铜氧化物中的双组分光导:预成对的必然结果

The Two Component Optical Conductivity in the Cuprates: A Necessary Consequence of Preformed Pairs

Dan Wulin, Hao Guo, Chih-Chun Chien, K. Levin

摘要:

我们解决如何有限频率的实际电导率$σ(ω)$在欠掺杂的铜氧化物的赝能隙的影响,对比的行为以上和以下$T_c$。的f-总和规则分析表明,举行。在这里,我们假设的pseudogap是与非凝聚对所产生的强于BCS的吸引。这导致了德鲁德峰和中红外(MIR)峰,后者与破坏电子对所需的能量有关。这些一般特征与实验结果一致。重要的是,这里没有比BCS理论更多的理论灵活性(现象学);我们发现的双组分电导率的起源是稳健的。

英文摘要:

We address how the finite frequency real conductivity $σ(ω)$ in the underdoped cuprates is affected by the pseudogap, contrasting the behavior above and below $T_c$. The f-sum rule is analytically shown to hold. Here we presume the pseudogap is associated with non-condensed pairs arising from stronger-than-BCS attraction. This leads to both a Drude and a mid infrared (MIR) peak, the latter associated with the energy needed to break pairs. These general characteristics appear consistent with experiment. Importantly, there is no more theoretical flexibility (phenomenology) here than in BCS theory; the origin of the two component conductivity we find is robust.

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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