论文标题
高温超导体中的单域条纹顺序
Single domain stripe order in a high-temperature superconductor
论文作者
论文摘要
自旋，电荷和晶格自由度的耦合导致在许多强相关的电子材料类别中出现新的物质状态。一个模型示例是非常规的超导性，人们普遍认为这是由于电子通过自旋激发的耦合而产生的。在丘比特高温超导体中，电荷和自旋程度的相互作用也反映在电荷动物园和旋转密度波顺序与超导性交织在一起的动物园中。一个关键的问题是，不同类型的密度波是仅仅是共存还是直接耦合。在这里，我们使用一种新型的中子衍射技术，具有上梁对焦，该技术使我们能够探究典型的高温超导体超导体LA1.88SR0.12CUO4在施加的单轴压力下的微妙的旋转密度波顺序，以证明它立即与电荷波阶相连。我们的结果表明，适合高温超导性的合适模型必须通过单轴电荷旋带波动同样考虑电荷和自旋程度。
The coupling of spin, charge and lattice degrees of freedom results in the emergence of novel states of matter across many classes of strongly correlated electron materials. A model example is unconventional superconductivity, which is widely believed to arise from the coupling of electrons via spin excitations. In cuprate high-temperature superconductors, the interplay of charge and spin degrees of freedom is also reflected in a zoo of charge and spin-density wave orders that are intertwined with superconductivity. A key question is whether the different types of density waves merely coexist or are indeed directly coupled. Here we use a novel neutron diffraction technique with superior beam-focusing that allows us to probe the subtle spin-density wave order in the prototypical high-temperature superconductor La1.88Sr0.12CuO4 under applied uniaxial pressure to demonstrate that it is immediately coupled with charge-density wave order. Our result shows that suitable models for high-temperature superconductivity must equally account for charge and spin degrees of freedom via uniaxial charge-spin stripe fluctuations.
