论文标题
在轻度，高温超导体中增强的电荷密度波相干性
Enhanced charge density wave coherence in a light-quenched, high-temperature superconductor
论文作者
论文摘要
超导性和电荷密度波（CDW）是竞争性的，但在铜酸盐超导体中是共存的命令。为了理解它们的微观相互依存关系，有必要在自然长度和时间尺度上辨别其相互作用的探针。我们使用Ultrafast谐振软X射线散射来跟踪YBA $ _ {2} $ _ {2} $ cu $ _ {3} $ o $ $ $ _ {6+x} $的瞬时演变，并通过红外激光脉冲进行超电导性。我们观察到CDW顺序的非热响应，其特征是相关长度在$ \ $ \ $ \ $ 1的超导淬灭之内的相关长度几乎加倍。我们的结果与一个模型一致，在这种模型中，超导性与CDW之间的相互作用通过空间连贯性的破坏而不均匀地表现出来，而超导性在稳定CDW拓扑缺陷（例如脱节）中起主要作用。
Superconductivity and charge density waves (CDW) are competitive, yet coexisting orders in cuprate superconductors. To understand their microscopic interdependence, a probe capable of discerning their interaction on its natural length and time scales is necessary. We use ultrafast resonant soft x-ray scattering to track the transient evolution of CDW correlations in YBa$_{2}$Cu$_{3}$O$_{6+x}$ following the quench of superconductivity by an infrared laser pulse. We observe a non-thermal response of the CDW order characterized by a near doubling of the correlation length within $\approx$ 1 picosecond of the superconducting quench. Our results are consistent with a model in which the interaction between superconductivity and CDW manifests inhomogeneously through disruption of spatial coherence, with superconductivity playing the dominant role in stabilizing CDW topological defects, such as discommensurations.
