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arXiv 1505.04501cond-mat.supr-con
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悄悄地关闭伪间隙

Closing the pseudogap quietly

J. G. Storey

摘要:

空穴掺杂铜氧化物高温超导体的物理性质受到称为赝能隙的能隙的严重影响,赝能隙的起源仍然是仅次于超导性本身的谜。一个关键的问题是赝能隙是否在温度T* 时闭合。没有比热异常,加上持续的熵损失高达300 K,长期以来一直表明赝能隙在T* 时不会消失。然而,在越来越多的其他技术证据指向相反的情况下,我们重新审视这个问题。在这里,我们调查,如果通过添加一个温度依赖性的赝能隙的能量和准粒子寿命的共振价键自旋液体模型的杨赖斯和张,我们可以关闭赝能隙悄悄地在比热。

英文摘要:

The physical properties of hole-doped cuprate high-temperature superconductors are heavily influenced by an energy gap known as the pseudogap whose origin remains a mystery second only to that of superconductivity itself. A key question is whether the pseudogap closes at a temperature T*. The absence of a specific heat anomaly, together with persistent entropy losses up to 300K, have long suggested that the pseudogap does not vanish at T*. However, amid a growing body of evidence from other techniques pointing to the contrary we revisit this question. Here we investigate if, by adding a temperature dependence to the pseudogap energy and quasiparticle lifetime in the resonating-valence-bond spin-liquid model of Yang Rice and Zhang, we can close the pseudogap quietly in the specific heat.

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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