Single-domain stripe order in a high-temperature superconductor
Single-domain stripe order in a high-temperature superconductor
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DOI：
10.1038/s42005-022-01061-4
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发表时间：
2022-04
影响因子：
5.5
通讯作者：
G. Simutis;J. Kuspert;Qisi Wang;J. Choi;D. Bucher;M. Boehm;F. Bouradot;M. Bertelsen;Ch. Wang
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文献类型：
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作者：
G. Simutis;J. Kuspert;Qisi Wang;J. Choi;D. Bucher;M. Boehm;F. Bouradot;M. Bertelsen;Ch. Wang
自旋、电荷和晶格自由度的耦合导致了许多类强关联电子材料中物质的新状态的出现。一个典型的例子是非传统的超导电性，人们普遍认为它是由电子通过自旋激发耦合而产生的。在铜酸盐高温超导体中，电荷和自旋自由度的相互作用也反映在与超导电性交织在一起的电荷和自旋密度波秩序的动物园中。一个关键的问题是，不同类型的密度波只是共存，还是确实是直接耦合的。在这里，我们得益于一种具有优越束流聚焦的中子散射技术，它允许我们探测典型的高温超导体LaSrCuO在单轴压力下的微妙的自旋密度波序列，以证明这两个密度波以相同的方式响应外部调谐参数。我们的结果表明，适用于高温超导电性的模型必须通过单轴电荷-自旋条纹涨落来同等地考虑电荷和自旋自由度。
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 profit from a neutron scattering technique with superior beam-focusing that allows us to probe the subtle spin-density wave order in the prototypical high-temperature superconductor LaSrCuOunder applied uniaxial pressure to demonstrate that the two density waves respond to the external tuning parameter in the same manner. 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.