Choi J, Wang Q, Jöhr S, Christensen N B, Küspert J, Bucher D, Biscette D, Fischer M H, Hücker M, Kurosawa T, Momono N, Oda M, Ivashko O, Zimmermann M V, Janoschek M, Chang J
Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland.
Department of Physics, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark.
Phys Rev Lett. 2022 May 20;128(20):207002. doi: 10.1103/PhysRevLett.128.207002.
In the cuprates, high-temperature superconductivity, spin-density-wave order, and charge-density-wave (CDW) order are intertwined, and symmetry determination is challenging due to domain formation. We investigated the CDW in the prototypical cuprate La_{1.88}Sr_{0.12}CuO_{4} via x-ray diffraction employing uniaxial pressure as a domain-selective stimulus to establish the unidirectional nature of the CDW unambiguously. A fivefold enhancement of the CDW amplitude is found when homogeneous superconductivity is partially suppressed by magnetic field. This field-induced state provides an ideal search environment for a putative pair-density-wave state.
在铜酸盐中，高温超导性、自旋密度波序和电荷密度波（CDW）序相互交织，并且由于畴的形成，对称性确定具有挑战性。我们通过X射线衍射研究了典型铜酸盐La_{1.88}Sr_{0.12}CuO_{4}中的CDW，采用单轴压力作为畴选择性刺激，以明确确定CDW的单向性质。当均匀超导性被磁场部分抑制时，发现CDW振幅增强了五倍。这种场诱导态为假定的对密度波态提供了理想的搜索环境。
