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arXiv 1701.04430cond-mat.supr-con
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超导体谱函数的相容双寿命模型

Consistent two-lifetime model for spectral functions of superconductors

František Herman, Richard Hlubina

摘要:

最近发现,在分析铜氧化物结区角分辨光电子能谱数据时,必须考虑至少有两个寿命的模型[T。Kondo等人,国家通信6,7699(2015)]。在本文中,我们比较了两个这样的模型。首先,我们证明了Kondo等人使用的唯象模型违反了占位数的求和规则。接下来,我们考虑最近提出的所谓Dynes超导体的模型,其中两个寿命测量对守恒和对破坏过程的强度。我们证明,该模型的Dynes超导体是完全符合已知的确切结果,我们详细研究所产生的光谱功能。最后,我们表明,在铜氧化物的节区的光谱函数可以很好地拟合的Dynes超导体的模型。

英文摘要:

Recently it has been found that models with at least two lifetimes have to be considered when analyzing the angle resolved photoemission data in the nodal region of the cuprates [T. Kondo et al., Nat. Commun. 6, 7699 (2015)]. In this paper we compare two such models. First we show that the phenomenological model used by Kondo et al. violates the sum rule for the occupation number. Next we consider the recently proposed model of the so-called Dynes superconductors, wherein the two lifetimes measure the strengths of pair-conserving and pair-breaking processes. We demonstrate that the model of the Dynes superconductors is fully consistent with known exact results and we study in detail the resulting spectral functions. Finally, we show that the spectral functions in the nodal region of the cuprates can be fitted well by the model of the Dynes superconductors.

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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