论文标题
过量（Pb，bi）2SR2CUO6+δ的超导性超导性的水坑形成，持续的间隙和非均值场分解
Puddle formation, persistent gaps, and non-mean-field breakdown of superconductivity in overdoped (Pb,Bi)2Sr2CuO6+δ
论文作者
论文摘要
丘比特高温超导体表现出许多无法解释的电子相，但经常认为，足够高的掺杂的超导性受常规的均值bardeen-cooper-cooper-schrieffer（BCS）理论的控制[1]。然而，最近的测量表明，当过渡温度TC变为零[2]时，配对电子（超流体密度）的数量与BCS理论的预期相矛盾。这种异常消失的起源尚不清楚。我们在（PB，BI）2SR2CUO6+δ高温超导器（PB，BI）的扫描隧道光谱测量结果表明，这是由于水坑超导性的出现所致我们的测量进一步表明，这种水坑是由差距填充驱动的，而间隙本身却持续了超过超导性的分解。重要的含义是，这不是导致超导性崩溃的配对相互作用。出乎意料的是，测得的差距到填充相关性还表明，通过疾病的成对破坏并不起主要作用，并且超导性超导性超导性的机理在定性上与常规平均场理论在质上有所不同。
The cuprate high-temperature superconductors exhibit many unexplained electronic phases, but it was often thought that the superconductivity at sufficiently high doping is governed by conventional mean-field Bardeen-Cooper-Schrieffer (BCS) theory[1]. However, recent measurements show that the number of paired electrons (the superfluid density) vanishes when the transition temperature Tc goes to zero[2], in contradiction to expectation from BCS theory. The origin of this anomalous vanishing is unknown. Our scanning tunneling spectroscopy measurements in the overdoped regime of the (Pb,Bi)2Sr2CuO6+δ high-temperature superconductor show that it is due to the emergence of puddled superconductivity, featuring nanoscale superconducting islands in a metallic matrix[3,4]. Our measurements further reveal that this puddling is driven by gap filling, while the gap itself persists beyond the breakdown of superconductivity. The important implication is that it is not a diminishing pairing interaction that causes the breakdown of superconductivity. Unexpectedly, the measured gap-to-filling correlation also reveals that pair-breaking by disorder does not play a dominant role and that the mechanism of superconductivity in overdoped cuprate superconductors is qualitatively different from conventional mean-field theory.
