论文标题
大厅数，特定的热量和超级-TC铜层的超级流体密度
Hall number, specific heat and superfluid density of overdoped high-Tc cuprates
论文作者
论文摘要
尽管经常被不屑一顾地描述为表现出常规的费米 - 液体般的行为，但大量的高-TC Cuprates具有几个意外的功能。热力学特性预计将大致恒定，掺杂量向零，这表明越来越多的载体仍保持在TC以下的正常状态。与BCS理论的期望相反，在TC附近，超导能量差距填充温度。最近，发现某些丘疹的霍尔数量的过渡延伸至非常高的掺杂（x〜0.27），远远超出了由热力学特性峰（x = 0.19）识别的伪群临界点。这对伪造是费米表面重建的结果提出了一个挑战。在本文中，我们通过将伪造的散射与伪模型的费米表面重建模型相结合，对所有这些观察结果提供了一致的解释。值得注意的是，掺杂掺杂的成对破裂的增加导致重建开始的点的分离和热力学特性的峰值。这一结果突出了破坏成对的基本要素，用于大量过度库层超导体的电子食谱。
Despite often being dismissively described as exhibiting conventional Fermi-liquid-like behaviour, heavily overdoped high-Tc cuprates sport several unexpected features. Thermodynamic properties expected to be roughly constant with doping decrease towards zero, signalling that a growing fraction of carriers remain in the normal state below Tc. Near Tc, the superconducting energy gap fills in with temperature, contrary to the expectations of BCS theory. Most recently a transition in the Hall number of some cuprates was found to extend to a very high doping (x~0.27), far beyond the pseudogap critical point identified by a peak in thermodynamic properties (x=0.19). This presents a challenge to the view that the pseudogap is a consequence of Fermi surface reconstruction. In this paper we present a consistent explanation for all these observations by combining pair-breaking scattering with a Fermi surface reconstruction model for the pseudogap. Notably, an increase in pair-breaking with doping leads to a separation of the points where reconstruction begins and the thermodynamic properties peak. This result highlights pair-breaking as an essential ingredient in the electronic recipe for heavily overdoped cuprate superconductors.
