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arXiv 1310.2645cond-mat.supr-con
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非费米液体中的量子振荡:对高温超导体的启示

Quantum oscillations in non-Fermi liquids: Implications for high-temperature superconductors

Peter Scherpelz, Yan He, K. Levin

摘要:

我们解决量子振荡实验在高Tc超导体和证据,从这些实验的赝隙与费米液相在高磁场。作为一个具体的替代费米液相,赝隙态,我们认为来自早期的工作中的一个基于Gor'kov的朗道能级方法。在这里,正常状态的配对间隙在高场的存在下是空间不均匀的,纳入小间隙值。除了d波能隙节点之外,这些都是量子振荡持续存在的原因。这里重要的是区分不同场景的方法。为此,我们研究的振荡的温度依赖性。详细的定量分析表明,这种温度依赖性的高场赝能隙状态的铜氧化物可以很好地“伪装”为费米液体。

英文摘要:

We address quantum oscillation experiments in high Tc superconductors and the evidence from these experiments for a pseudogap versus a Fermi liquid phase at high magnetic fields. As a concrete alternative to a Fermi liquid phase, the pseudogap state we consider derives from earlier work within a Gor'kov-based Landau level approach. Here the normal state pairing gap in the presence of high fields is spatially non-uniform, incorporating small gap values. These, in addition to d-wave gap nodes, are responsible for the persistence of quantum oscillations. Important here are methodologies for distinguishing different scenarios. To this end we examine the temperature dependence of the oscillations. Detailed quantitative analysis of this temperature dependence demonstrates that a high field pseudogap state in the cuprates may well "masquerade" as a Fermi liquid.

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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