论文标题
在典型的库酸酯超导体中解开互相交织的量子状态
Disentangling Intertwined Quantum States in a Prototypical Cuprate Superconductor
论文作者
论文摘要
自发对称性破坏构成物质的范式分类方案。然而，断裂的对称性还需要域变性，这通常会阻碍对新型低对称状态的识别。在量子物质中，通过竞争互动的对称破坏顺序使这一点变得复杂。一个典型的例子是掺杂的铜矿中非常规超导性和密度波阶的一个例子，其中它们各自的对称关系仍然是一个关键问题。 Using uniaxial pressure as a domain-selective stimulus in combination with x-ray diffraction, we unambiguously reveal that the fundamental symmetry of the charge order in the prototypical cuprate La$_{1.88}$Sr$_{0.12}$CuO$_4$ is characterized by uniaxial stripes.我们进一步证明了通过磁场调整非常规超导性的这种条纹顺序的直接竞争。我们的研究建立的电荷密度波状态的条纹性质是存在超导配对密度波的先决条件 - 这是一项理论上的建议，阐明了在非常规超导体中相互交织的量子相之间的相互关系 - 并为其高素质实现的现实化提供了方式。
Spontaneous symmetry breaking constitutes a paradigmatic classification scheme of matter. However, broken symmetry also entails domain degeneracy that often impedes identification of novel low symmetry states. In quantum matter, this is additionally complicated by competing intertwined symmetry breaking orders. A prime example is that of unconventional superconductivity and density-wave orders in doped cuprates in which their respective symmetry relation remains a key question. Using uniaxial pressure as a domain-selective stimulus in combination with x-ray diffraction, we unambiguously reveal that the fundamental symmetry of the charge order in the prototypical cuprate La$_{1.88}$Sr$_{0.12}$CuO$_4$ is characterized by uniaxial stripes. We further demonstrate the direct competition of this stripe order with unconventional superconductivity via magnetic field tuning. The stripy nature of the charge-density-wave state established by our study is a prerequisite for the existence of a superconducting pair-density-wave -- a theoretical proposal that clarifies the interrelation of intertwined quantum phases in unconventional superconductors -- and paves the way for its high-temperature realization.
