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Measurement of Spin Dynamics in a Layered Nickelate Using X-Ray Photon Correlation Spectroscopy: Evidence for Intrinsic Destabilization of Incommensurate Stripes at Low Temperatures
- Ricci, Alessandro;
- Poccia, Nicola;
- Campi, Gaetano;
- Mishra, Shrawan;
- Müller, Leonard;
- Joseph, Boby;
- Shi, Bo;
- Zozulya, Alexey;
- Buchholz, Marcel;
- Trabant, Christoph;
- Lee, James CT;
- Viefhaus, Jens;
- Goedkoop, Jeroen B;
- Nugroho, Agustinus Agung;
- Braden, Markus;
- Roy, Sujoy;
- Sprung, Michael;
- Schüßler-Langeheine, Christian
- et al.
Published Web Location
https://doi.org/10.1103/physrevlett.127.057001Abstract
We study the temporal stability of stripe-type spin order in a layered nickelate with x-ray photon correlation spectroscopy and observe fluctuations on timescales of tens of minutes over a wide temperature range. These fluctuations show an anomalous temperature dependence: they slow down at intermediate temperatures and speed up on both heating and cooling. This behavior appears to be directly connected with spatial correlations: stripes fluctuate slowly when stripe correlation lengths are large and become faster when spatial correlations decrease. A low-temperature decay of nickelate stripe correlations, reminiscent of what occurs in cuprates as a result of a competition between stripes and superconductivity, hence occurs via loss of both spatial and temporal correlations.
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