Scattering and Pairing in Cuprate Superconductors
Scattering and Pairing in Cuprate Superconductors
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DOI：
10.1146/annurev-conmatphys-070909-104117
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发表时间：
2010-03
影响因子：
22.6
通讯作者：
L. Taillefer
中科院分区：
文献类型：
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作者：
L. Taillefer
经过二十多年的研究，铜酸盐异常强大的超导电性的起源仍然是一个争论的主题。在这里，我们遵循一条新的线索：超导的起始温度与使电阻率在温度中线性的反常正常态散射的强度成比例。在有机超导体中也发现了同样的线性电阻率与T_c之间的关系，对于有机超导体，已知其配对来自附近的反铁磁相的涨落，而在磷灰石超导体中，也可能出现反铁磁性的情况。在铜酸盐中，问题是伪隙相位是否起到了相应的作用，它的涨落负责配对和散射。我们回顾了最近关于这一阶段的研究-它的边界，它的量子临界点，以及它的破缺对称性。新出现的图景是一个具有自旋-密度-波序和涨落的相，这与有机超导体、重费密子超导体和重费米子超导体大致相似。
The origin of the exceptionally strong superconductivity of cuprates remains a subject of debate after more than two decades of investigation. Here we follow a new lead: The onset temperature for superconductivity scales with the strength of the anomalous normal-state scattering that makes the resistivity linear in temperature. The same correlation between linear resistivity and Tc is found in organic superconductors, for which pairing is known to come from fluctuations of a nearby antiferromagnetic phase, and in pnictide superconductors, for which an antiferromagnetic scenario is also likely. In the cuprates, the question is whether the pseudogap phase plays the corresponding role, with its fluctuations responsible for pairing and scattering. We review recent studies that shed light on this phase—its boundary, its quantum critical point, and its broken symmetries. The emerging picture is that of a phase with spin-density-wave order and fluctuations, in broad analogy with organic, pnictide, and heavy-fermion superconductors.