AI Article Synopsis
- Understanding the formation of charge and spin-ordered states in materials like La_{2-x}Sr_{x}NiO_{4+δ} is key to unraveling high-temperature superconductivity qualities.
- Recent studies using x-ray photon correlation spectroscopy show that the spin order stripes in LSNO have slow dynamics and reveal that these domains are spatially anisotropic.
- The fluctuations observed in the amplitude signal of the spin order stripes are linked to thermal fluctuations at the domain boundaries, suggesting a complex relationship between the dimensions and dynamics of the SO domains.
Article Abstract
Understanding the formation and dynamics of charge and spin-ordered states in low-dimensional transition metal oxide materials is crucial to understanding unconventional high-temperature superconductivity. La_{2-x}Sr_{x}NiO_{4+δ} (LSNO) has attracted much attention due to its interesting spin dynamics. Recent x-ray photon correlation spectroscopy studies have revealed slow dynamics of the spin order (SO) stripes in LSNO. Here, we applied resonant soft x-ray ptychography to map the spatial distribution of the SO stripe domain inhomogeneity in real space. The reconstructed images show the SO domains are spatially anisotropic, in agreement with previous diffraction studies. For the SO stripe domains, it is found that the correlation lengths along different directions are strongly coupled in space. Surprisingly, fluctuations were observed in the real space amplitude signal, rather than the phase or position. We attribute the observed slow dynamics of the stripe domains in LSNO to thermal fluctuations of the SO domain boundaries.
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| http://dx.doi.org/10.1103/PhysRevLett.127.275301 | DOI Listing |
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