Evidence for rare-region physics in the structural and electronic degrees of freedom of the nickelate La${}_{2-x}$Sr${}_x$NiO${}_4$

R. J. Spieker, B. Krohnke, D. Zhai +11

We present a diffuse neutron and x-ray scattering study of structural, spin- and charge-density-wave fluctuations in the electrical insulator La${}_{2-x}$Sr${}_x$NiO${}_4$. This lamellar…