Quenched disorder and vestigial nematicity in the pseudogap regime of the cuprates
Quenched disorder and vestigial nematicity in the pseudogap regime of the cuprates
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DOI：
10.1073/pnas.1406019111
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发表时间：
2014-06-03
影响因子：
11.1
通讯作者：
Kivelson, Steven Allan
中科院分区：
文献类型：
--
作者：
Nie, Laimei;Tarjus, Gilles;Kivelson, Steven Allan
Cuprate高温超导体一直是前所未有的激烈和持续研究的重点，这不仅是因为它们具有高的超导过渡温度，还因为它们代表了最精心研究的高度相关电子材料的实例。特别是，该相图的伪制度策略表现出各种神秘的新兴行为。在过去的几年中，NMR和扫描隧道显微镜（STM）研究以及新一代X射线散射实验的证据已经积累（CDW）在此制度中，秩序与超导性“交织在一起”。另外，运输，STM，中子散射和光学实验已经产生了证据，但完全理解了与远程点组对称性的相关模式的存在，并具有电子纽人特征。在存在弱淬灭疾病的情况下，我们对Landau-Ginzburg-Wilson的有效领域CDW进行了理论分析。尽管在这种系统中排除了急剧相变和远程CDW顺序的可能性，但我们表明，在单向（条纹）CDW的情况下，我们考虑明确生成基因的任何离散对称性的破坏对称性的方面生存至非零危重障碍强度。这种“遗传顺序”受到明确的宏观检测的约束，可以作为理想，零疾病限制中CDW秩序的头像。根据这些结果，很容易解释了掺杂孔铜质的伪库制度的各种实验。
The cuprate high-temperature superconductors have been the focus of unprecedentedly intense and sustained study not only because of their high superconducting transition temperatures, but also because they represent the most exquisitely investigated examples of highly correlated electronic materials. In particular, the pseudogap regime of the phase diagram exhibits a variety of mysterious emergent behaviors. In the last few years, evidence from NMR and scanning tunneling microscopy (STM) studies, as well as from a new generation of X-ray scattering experiments, has accumulated, indicating that a general tendency to short-range-correlated incommensurate charge density wave (CDW) order is "intertwined" with the superconductivity in this regime. Additionally, transport, STM, neutron-scattering, and optical experiments have produced evidence-not yet entirely understood-of the existence of an associated pattern of long-range-ordered point-group symmetry breaking with an electron-nematic character. We have carried out a theoretical analysis of the Landau-Ginzburg-Wilson effective field theory of a classical incommensurate CDW in the presence of weak quenched disorder. Although the possibilities of a sharp phase transition and long-range CDW order are precluded in such systems, we show that any discrete symmetry-breaking aspect of the charge order-nematicity in the case of the unidirectional (stripe) CDW we consider explicitly-generically survives up to a nonzero critical disorder strength. Such "vestigial order," which is subject to unambiguous macroscopic detection, can serve as an avatar of what would be CDW order in the ideal, zero disorder limit. Various recent experiments in the pseudogap regime of the hole-doped cuprates are readily interpreted in light of these results.