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Pseudogap in high-temperature superconductors

机译:伪超高温高温导体

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The paper reviews the basic experimental facts and a number of theoretical models relevant to the understanding of the pseudogap state in high-temperature superconductors. The state is observed in the region of less-than-optimal current-carrier concentrations in the HTSC cuprate phase diagram and manifests itself as various anomalies in the electronic properties, presumably due to the antiferromagnetic short-range-order fluctuations that occur as the antiferromagnetic region of the phase diagram is approached. The interaction of current carriers with these fluctuations leads to an anisotropic transformation of the electron spectrum and causes the system to behave as a non-Fermi liquid in certain regions of the Fermi surface. Simple theoretical models for describing the basic properties of the pseudogap state, in particular renormalization-induced anomalies in the superconducting state, are discussed.
机译:本文回顾了基本的实验事实和与理解高温超导体中的伪间隙状态有关的许多理论模型。在HTSC铜酸盐相图中,在低于最佳载流子浓度的区域中观察到该状态,并在电子特性中表现为各种异常,这可能是由于反铁磁短程波动(作为反铁磁而发生)引起的接近相图的区域。载流子与这些波动的相互作用导致电子光谱的各向异性转变,并使系统在费米表面的某些区域中表现为非费米液体。讨论了用于描述伪间隙状态的基本属性的简单理论模型,特别是在超导状态下由归一化引起的异常。

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