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arXiv 1111.5033cond-mat.supr-concond-mat.str-el
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铜氧化物中量子临界态下的配对胶活化

Pairing Glue Activation in Cuprates within the Quantum Critical Regime

Josef Ashkenazi, Neil F. Johnson

摘要:

多体量子物理学的一个重大挑战是解释铜氧化物和类似系统(如铁磷属元素化物和硫属元素化物)中量子临界性和高温超导性之间的明显联系。在这里,我们认为,量子临界制度在激活强配对机制中起着至关重要的作用:虽然配对玻色子创造了一个破坏对称性的不稳定性,抑制配对,这些破坏对称性的临界制度的组合可以恢复这种对称性的配对准粒子。这个条件被证明是满足一个大的U型天线。一个隐藏的量子相变,然后之间的费米液体和非费米液体的对称性破缺条纹状态,和一个临界制度,其中破缺对称状态相结合。

英文摘要:

A grand challenge in many-body quantum physics is to explain the apparent connection between quantum criticality and high-temperature superconductivity in the cuprates and similar systems, such as the iron pnictides and chalcogenides. Here we argue that the quantum-critical regime plays an essential role in activating a strong-pairing mechanism: although pairing bosons create a symmetry-breaking instability which suppresses pairing, the combination of these broken-symmetry states within the critical regime can restore this symmetry for the paired quasiparticles. This condition is shown to be met within a large-U ansatz. A hidden quantum phase transition then arises between a Fermi-liquid and a non-Fermi-liquid broken-symmetry striped state, and a critical regime in which the broken-symmetry states are combined.

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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