Density Wave Probes Cuprate Quantum Phase Transition
Density Wave Probes Cuprate Quantum Phase Transition
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密度波探针铜酸盐量子相变
DOI：
10.1103/physrevx.9.021021
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发表时间：
2019
影响因子：
12.5
通讯作者：
and Mohammad H. Hamidian
中科院分区：
文献类型：
--
作者：
Tatiana A. Webb;Michael C. Boyer;Yi Yin;Debanjan Chowdhury;Yang He;Takeshi Kondo;T. Takeuchi;H. Ikuta;Eric W. Hudson;Jennifer E. Hoffman;and Mohammad H. Hamidian
在铜氧化物中，接近反铁磁莫特绝缘态的强关联引起了一系列超越高温超导性的非常规现象。发展基态演化的完整描述对于解码复杂的相图至关重要。在这里，我们使用的结构破坏的平移对称性，即，-形状因子电荷调制inas探针的基态重组发生在从截断费米弧到一个大的费米表面的过渡。我们使用真实的空间成像的纳米级的电子不均匀性作为一种工具，以访问一系列的掺杂在每个样品，我们明确验证的光谱间隙作为代理本地空穴掺杂。从电荷调制波矢的依赖关系中，我们发现了一个与费米面从弧到大空穴袋的跃迁相一致的量子到无公度的跃迁，证明了这种量子相变两侧电子关联的性质是不同的.此外，过度掺杂侧的无公度波矢量的掺杂依赖性与简单的费米表面驱动的不稳定性不一致。
In cuprates, the strong correlations in proximity to the antiferromagnetic Mott insulating state give rise to an array of unconventional phenomena beyond high-temperature superconductivity. Developing a complete description of the ground-state evolution is crucial to decoding the complex phase diagram. Here we use the structure of broken translational symmetry, namely,-form factor charge modulations inas a probe of the ground-state reorganization that occurs at the transition from truncated Fermi arcs to a large Fermi surface. We use real space imaging of nanoscale electronic inhomogeneity as a tool to access a range of dopings within each sample, and we definitively validate the spectral gapas a proxy for local hole doping. From thedependence of the charge modulation wave vector, we discover a commensurate-to-incommensurate transition that is coincident with the Fermi-surface transition from arcs to large hole pocket, demonstrating the qualitatively distinct nature of the electronic correlations governing the two sides of this quantum phase transition. Furthermore, the doping dependence of the incommensurate wave vector on the overdoped side is at odds with a simple Fermi-surface-driven instability.