论文标题
库酸酯超导体形成一系列纳米镜头约瑟夫森连接的证据
Evidence that cuprate superconductors form an array of nanoscopic Josephson junctions
论文作者
论文摘要
最近对超级化合物的电荷不稳定性的测量重新点燃了铜酸盐通过纳米镜荷域之间的约瑟夫森偶联而成为超导体的提议。我们使用相位订购动力学的理论表明，在CuO平面中形成了一系列被陡峭的屏障隔开的自由能井在CUO平面中形成的不相关的电荷密度波（CDW）。这些域中的电荷振荡产生与这些障碍高度成正比的净孔孔吸引力。随之而来的是，自洽的计算在表征颗粒超导体的CDWDOON中产生局部超导幅度。我们表明，约瑟夫森偶联促进的远程相阶的过渡阐明了许多知名的库酸酯特征，例如高磁穿透深度各向异性和伪模的起源等。此外，约瑟夫森能量的平均水平近来繁殖了基于LA的膜的平面超流体温度依赖性以及一个20岁的开放问题的铜酸盐的超导巨大接近效应。
Recent measurements of charge instabilities in overdoped compounds rekindled the proposal that cuprates become superconductors by long-range order through Josephson coupling between nanoscopic charge domains. We use the theory of phase-ordering dynamics to show that incommensurate charge density waves (CDWs) are formed in the CuO planes by a series of free-energy wells separated by steep barriers. Charge oscillations in these domains give rise to a net hole-hole attraction proportional to the height of these barriers. Concomitantly, the self-consistent calculations yield localized superconducting amplitudes in the CDWdomains characterizing a granular superconductor. We show that a transition by long-range phase order promoted by Josephson coupling elucidates many well-known features of cuprates like the high magnetic penetration depth anisotropy and the origin of the pseudogap, among others. Furthermore, the average Josephson energy reproduces closely the planar superfluid density temperature dependence of La-based films and the superconducting giant proximity effects of cuprates, a 20-year-old open problem.
