Spin excitations in a single La2CuO4 layer.

@article{Dean2012SpinEI,
  title={Spin excitations in a single La2CuO4 layer.},
  author={Mark. P. M. Dean and Ross S Springell and Claude Monney and K. J. Zhou and J. Pereiro and Ivan Bo{\vz}ovi{\'c} and B Dalla Piazza and Henrik M. R{\o}nnow and Elvezio Morenzoni and Jeroen van den Brink and Thorsten Schmitt and J P Hill},
  journal={Nature materials},
  year={2012},
  volume={11 10},
  pages={
          850-4
        }
}
Cuprates and other high-temperature superconductors consist of two-dimensional layers that are crucial to their properties. The dynamics of the quantum spins in these layers lie at the heart of the mystery of the cuprates. In bulk cuprates such as La(2)CuO(4), the presence of a weak coupling between the two-dimensional layers stabilizes a three-dimensional magnetic order up to high temperatures. In a truly two-dimensional system however, thermal spin fluctuations melt long-range order at any… 

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