Wu, L;
Shen, Y;
Barbour, AM;
Wang, W;
Prabhakaran, D;
Boothroyd, AT;
Mazzoli, C;
... Robinson, IK; + view all
(2021)
Real Space Imaging of Spin Stripe Domain Fluctuations in a Complex Oxide.
Physical Review Letters
, 127
(27)
, Article 275301. 10.1103/physrevlett.127.275301.
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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. La2−xSrxNiO4þδ (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.
| Type: | Article |
|---|---|
| Title: | Real Space Imaging of Spin Stripe Domain Fluctuations in a Complex Oxide |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/physrevlett.127.275301 |
| Publisher version: | https://doi.org/10.1103/PhysRevLett.127.275301 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10141099 |
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